The population of a fish farm is modeled by the equation where t is time in yearsP(t) = 1250/ 2+3e ^ -0.6tpart one)part two)part three)part four)part five)
Answers
The Solution:
Given the equation that modeled the population of fish after time (t) in years as below:
[tex]p(t)=\frac{1250}{2+3e^{-0.6t}}[/tex]part 1:
We are to find the initial population of fish. This means we are to find the value of p when t = 0.
[tex]p(0)=\frac{1250}{2+3e^{-0.6(0)}}=\frac{1250}{2+3e^0}=\frac{1250}{2+3}=\frac{1250}{5}=250\text{ fish}[/tex]Part 2:
We are required to find the doubling time (t) for this population (Round the answer to the nearest tenth). This means we are to find t when P(t) = 500.
Note: double of 250 fish is 2x250 = 500 fish.
[tex]\begin{gathered} p(t)=\frac{1250}{2+3e^{-0.6t}} \\ \\ \text{Where P(t)=500, and t=?} \end{gathered}[/tex][tex]\begin{gathered} 500=\frac{1250}{2+3e^{-0.6t}} \\ \text{Cross multiplying, we get} \\ \\ 500(2+3e^{-0.6t})=1250 \\ \text{ Dividing both sides by 500, we get} \\ \\ \frac{500(2+3e^{-0.6t})}{500}=\frac{1250}{500} \end{gathered}[/tex][tex]\begin{gathered} 2+3e^{-0.6t}=2.5 \\ \text{ Collecting the like terms, we get} \\ 3e^{-0.6t}=2.5-2 \\ 3e^{-0.6t}=0.5 \end{gathered}[/tex]Dividing both sides by 3, we get
[tex]\begin{gathered} \frac{3e}{3}^{-0.6t}=\frac{0.5}{3} \\ \\ e^{-0.6t}=\frac{1}{6} \end{gathered}[/tex]Taking the natural log of both sides, we get
[tex]undefined[/tex]Related Questions
Eloise practiced piano for 2/5 of an hour. Sarah practiced piano for 3/4 of an hour.
How much longer did Sarah practice than Eloise?
Enter your answer as a fraction in simplest form by filling in the boxes.
Answers
Sarah practiced 7/20 of an hour more than Eloise
Given
Eloise did practice 2/5 of an hour
Sarah practiced for 3/4 of an hour
total time spent by Eloise = 2/5 x 60
= 24 minutes
Total time spent by Sarah = 3/4 x 60
= 45 minutes
Hence Sarah spent 45-21 minutes more.
Sarah spent 21 minutes more than Eloise
Converting into fractions 21 minutes will be,
a/b x 60 =21
7/20 minutes
As a result, Sarah practiced the piano for 7/20 more minutes than Eloise.
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by selling a toy for rupee 25 , a man gains 25%. find the CP of the toy
find the answer
Answers
Answer:
CP=Rs 20
Step-by-step explanation:
Selling price=Rs 25
Gain percent=25
then,
Cp =100*25/100+25
Cp=2500/100+25
Cp=2500/125
CP=Rs 20
Answer:
CP = ₹ 20
Step-by-step explanation:
Finding the Cost price:[tex]\sf \boxed{CP =\dfrac{100 }{(100+gain \ percent)}*SP}[/tex]
Gain % = 25%
SP = ₹ 25
[tex]\sf CP = \dfrac{100}{100+25}*25\\\\ CP = \dfrac{100}{125}*25[/tex]
= ₹ 20
On Friday, Ariel received a $450 paycheck. On
Saturday, she spent $30 on gasoline and $15 on lunch.
What percent of her paycheck did Ariel spend on
Saturday?
Answers
Answer:
10%
Step-by-step explanation:
30+15=45
45 is 10% of 450 as 450/10= 45
3(3x - 6) = 18 solve for x simplify your answer as much as possible
Answers
(3x - 6)/3 = 18/3
3x -6 = 6
3x - 6 = 6
-6 = -6
3x/3 = 0/3
X = 0
3 and 20
Drag each pair of numbers to show if their greatest common factor (GCF) is less than
5, equal to 5, or greater than 5.
12 and 30
GCF is less than 5.
DRAG AND
DROP ITEMS
HERE
25 and 30
E
[
15 and 20
6 and 33
GCF is equal to 5.
DRAG AND
DROP ITEMS
HERE
20 and 30
CLEAR CHECK
GCF is greater than 5.
DRAG AND
DROP ITEMS
HERE
A
Answers
The matching pairs of the greatest common factor (GCF) of the numbers is given as follows:
3 and 20: less than 5.12 and 30: greater than 5.25 and 30: equals to 5.15 and 20: equals to 5.6 and 33: less than 5.20 and 30: greater than 5.How to find the greatest common factor between two numbers?As the common word states, the greatest common factor between two numbers a and b is the greatest number by which both numbers a and b are divisible by.
Hence, the GCFs for the pairs in this problem are given as follows:
3 and 20 = 1, as 3 is prime(only divisible by 1 and by itself), hence less than 5.12 and 30 = 6, as 12/6 = 2 and 30/6 = 5, hence greater than 5.25 and 30 = 5, as 25/5 = 5 and 30/5 = 6, hence equals to 5.15 and 20 = 5, 15/5 = 5 and 20/5 = 4, hence equals to 5.6 and 33 = 3, as 6/3 = 2 and 33/3 = 11, hence the GCF of 3 is less than 5,20 and 30 = 10, as 20/10 = 2 and 30/10 = 3, hence the GCF of 10 is greater than 5.More can be learned about the greatest common factor at https://brainly.com/question/219464
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Does This graph represents a proportional or not proportional relationship
Answers
The given graph is a proportional Relationship graph.
What are proportional relationship graph?A proportional relationship graph between two variables is a relationship where the ratio between the two variables is always the same.
Let us formulate a table of values of given graph
Time Distance
5 6
10 12
15 18
Now let us check whether the given values are making equivalent ratios or not by definition of proportional graphs.
5/6 is one
10/12 is 5/6
15/18 is 5/6
Hence the ratios are equivalent. The graph has same slope everywhere and passing through the origin.
Hence the graph is Proportional.
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Tom is trying to write 3/47 as a decimal. he used long division and divided until he got the quotient 0.0638297872, at which point he stoped. since the decimal doesnt seem to terminate or repart, he concluded that 3/47 is not rational. do you agree or deagree? why?
Answers
Answer:
Disagree
Step-by-step explanation:
The decimal expansion may have a longer period than the division he carried out.
What number am I?
I am less than 10.
I am the only number
that gives a bigger
answer when you add
me to myself than when
you multiply me by
myself.
I am
Answers
Answer:
1
Step-by-step explanation:
We see that 1 + 1 = 2, while 1 * 1 = 1
So 1 gives a bigger answer when you add 1 to itself then when 1 is multiplied by itself
In the answer it is given that this is the only number for which this is correct, so there is not really a need to check for other options
but if you would want, you could just compute 2 till 9 and see that for example 2 + 2 = 4 and 2 *2 = 4, which are the same, so it is not a bigger number when added then when multiplied.
How many solutions exist for the following system if m1 ≠ m2?
y = m1x + b
y = m2x + b
answers:
an infinite number, none, one, the number of solutions cannot be determined.
Answers
Because the lines have different slopes, we conclude that there is only one intercept, and thus, the system of linear equations has only one solution.
How many solutions does the system of equations has?Remember that a system of equations has as many solutions as intercepts are when we graph both equations in the same coordinate axis.
Now, in this case, we have a system of linear equations:
y = m1*x + b
y = m2*x + b
Remember that linear equations are parallel only if the two lines have the same slope, in this case, we know that m1 ≠ m2, so the slopes are different.
Then the lines are not parallel, which means that intersect only one time, so we conclude that the system of equations has one solution.
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the ages of three friends are represented by 3 consecutive odd integers. the sum of their ages is 63. if the youngest of the three is represented by x , what equation could be used to find x?
Answers
x + (x + 2) + (x + 4) = 63
Step by step
We know x is the youngest
We know our next number is 2 more than x because we are skipping the even number to go to the next odd number so
(x + 2)
We know the 3rd number is 2 more than the previous number because again, we are skipping the even number to go to the next odd number so
(x + 4)
And the 3 numbers added together = 63
x + (x + 2) + (x + 4) = 63
Is your answer
To solve we would have
3x + 6 = 63
Subtract 6 from both sides to combine constants
3x +6 -6 = 63 - 6
Combine
3x = 57
Divide both sides by 3 to solve for x
3/3 x = 57/3
x = 19
x + 2 = 21
x + 4 = 23
Added together = 63
Problem solved!
find the circumference of circle with radius X CM
Answers
Answer:
To calculate the circumference of a circle, multiply the diameter of the circle with π (pi). The circumference can also be calculated by multiplying 2×radius with pi (π=3.14).
Step-by-step explanation:
brainiest please
Bryant learned a total of 12 appetizer recipes over the course of 3 weeks of culinary school. After 12 weeks of culinary school, how many total appetizer recipes will Bryant know?
Answers
After 12 weeks, Bryant will know 48 appetizers
How to calculate the number of appetizers ?The first is to calculate the number of appetizers learnt in one week
12= 3
x= 1
cross multiply both sides
3x= 12
x= 12/3
x= 4
The number of appetizers learnt in 12 weeks can be calculated as follows
4= 1
y= 12
cross multiply both sides
y= 12 × 4
= 48
Hence 48 appetizers was discovered in 12 weeks
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the sat and act college entrance exams are taken by thousands of students each year. the mathematics portions of each of these exams produce scores that are ap- proximately normally distributed. in recent years, sat mathematics exam scores have averaged 480 with standard deviation 100. the average and standard deviation for act mathematics scores are 18 and 6, respectively.
Answers
a) 75.80 percentage of students will be scoring below 550 in a typical year.
b) 22.2 marks should be set by the engineering school setas a comparable standard on ACT math test.
Here we have been mentioned that in the recent years, sat maths exam scores have averaged 480 with standard deviation 100. the average and standard deviation for act mathematics scores are 18 and 6, respectively.
a) The percentage of the students scoring below 550 marks in a typical year is calculated as follows:
Let x be the SAT score
So, x follows normal distribution
Given above,
mean (μ) = 480
standard deviation (σ) = 100
we will find P ( x < 550)
We will use the excel function NORM.DIST to find the required probability
P(x < 550) = NORM.DIST[tex](550, 480, 100, TRUE)[/tex]
= 0.7580
= 75.80%
Hence the percentage of the students who are scoring below 550 in a typical year = 75.80%
b) We calculate the score to be set by the engineering school as a comparable standard on the ACT math test as follows:
Let Z be the ACT score
Z follows the normal distribution
Given above, μ = 18 and σ = 6
Let Z' be the ACT score comparable to the standard set for SAT
Then we need to find Z' such that P(Z < Z') = 75.80% = 0.758
From standard normal tables we get Y' such that
Z' = NORM.INV[tex](0.758, 18, 6)[/tex]
= 22.2
The ACT score that needs to be set by the college = 22.2 marks
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5 -4y+y-3 how to you answer it?
Answers
Answer: -2[tex]Y^2[/tex]
Step-by-step explanation:
Becky made a box in the shape of the triangular prism shown. If she were to wrap this box, how many square inches of wrapping paper would she need? Select one: O 225 square inches O 240 square inches O 156 square inches O 216 square inches
Answers
Answer:
216 square inches
Explanation:
To find out how many square inches of wrapping paper she would need, calculate the total surface area of the triangular prism.
The triangular prism has five faces:
• Two equal triangles with base 6 in. and height 4 in.
,• Two rectangles (Rectangle 1) of dimension 5 in. by 12 in.
,• A rectangle of dimension 6 in. by 12 in.
Therefore:
[tex]\begin{gathered} \text{Surface Area}=2(\text{Area of Triangle)+2(Area of Rectangle 1)+Area of Rect. 2} \\ =2(\frac{1}{2}\times6\times4)+2(5\times12)+(6\times12) \\ =24+120+72 \\ =216\; in^2 \end{gathered}[/tex]She would need 216 square inches of wrapping paper.
Abhasra made a trip to the town hall and back. On the trip there she drove 60 mph and on the return trip she went 75 mph . How long did the trip there take if the return trip took four hours ?
HELP ASAP PLEEASE!!
Answers
Answer:
Trip to town hall took 5 hours
Step-by-step explanation:
Distance traveled = Speed x Time
We know the return trip took 4 hours at 75 mph
So distance traveled from town hall to start = 75 x 4 = 300 miles
The distance from start to town hall is assumed to be the same.
So distance to town hall from start = 300 miles also
Time taken to travel 300 miles at 60 mph = 300/60 = 5 hours
Someone help pls tysm
Answers
Answer:
youd get 0.25 off and yes you would save 25 cents the difference would be 2.25 dollars instead of 2.50
Step-by-step explanation:
im so so sorry if im wrong so so sorry
Pls ayuda. Plsssss. Es para mañana
Answers
3. x=43,2
4. x=10
5. x=20
The sun three times a number x and 10 is -14
Answers
Answer: 3x+10=-14
I'm assuming you mean the sum three times a number x is -14
Step-by-step explanation:
3 times is 3 multiplied with a number, 3x
sum means the value you get from addition so it would be 3x+10 as its a number and ten
as the sum is -14 you set 3x+10 equal to -14
Which inequality comparing two of the expressions is true when 0.1 ≤x≤0.4?
Answers
√x > x↑2
This is because, x↑2 is equal to -.4 and √x is equal to 0.1. This means x equals to 0.2
The solution is : The true inequality is √x > x³, Option C.
What is inequality?An inequality is a relation which makes a non-equal comparison between two numbers or mathematical expressions.
Here, we have,
Given 0.5≤ x ≤ 0.7
According to the range of x, we will check which option is true
Let x = 0.6
A. x/3 > √x
If x = 0.6
∴0.6/3 > √0.6 ⇒ 0.2 > 0.77 ⇒ Wrong inequality
B. x³ > 1/x
If x = 0.6
∴ 0.6³ > 1/0.6 ⇒ 0.216 > 1.667 ⇒ Wrong inequality
C. √x > x³
If x = 0.6
∴ √0.6 > 0.6³ ⇒ 0.77 > 0.216 ⇒ True inequality
D. (x/3) > (1/x)
If x = 0.6
∴ 0.6/3 > 1/0.6 ⇒ 0.2 > 1.667 ⇒ Wrong inequality
So, The true inequality is option C.
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complete question:
Which inequality comparing two of the expressions below is true when 0.5
f(x)=y^5-2y^3+y find the zeros of this function
Answers
Answer: y=0 y=-1 y=1
Step-by-step explanation:
[tex]\displaystyle\\f(y)=y^5-2y^2+y\\\\y^5-2y^2+y=0\\\\y(y^4+2y^2+1)=0\\\\y((y^2)^2+2(y^2)(1)+1^2)=0\\\\y(y^2-1)^2=0\\\\y=0\\\\(y^2-1)^2=0\\\\y^2-1-0\\\\(y+1)(y-1)=0\\\\y+1=0\\\\y+1-1=0-1\\\\y=-1\\\\y-1=0\\\\y-1+1=0+1\\\\y=1[/tex]
HELP ME OUT PLS MARKING BRAINLEIST
Answers
Answer:
243
Step-by-step explanation:
IM PRETTY SURE IT 243 PLS NOW BRAINLIST
113 disproves the conjecture that all number ending in 3 are divisible by 3
What is divisible rule ?Mathematicians use a set of precise rules called the "divisibility rules" to determine whether a given integer is divisible by a certain number or not. Examples of well-known divisibility tests range from 2 to 20. It enables us to calculate multiples and factors of numbers without having to use lengthy division. Applying the rules of divisibility, a person can determine if a number is divisible by another number or not.
Divisibility rule for 3 states that a number is completely divisible by 3 if the sum of its digits is divisible by 3.
243 is divisible by 3 as its sum is 2 + 4 + 3 = 9 and 9 easily get divided by 3
113 is not divisible by 3 as its sum is 5 and 5 can not divided by 3
therefore ,
113 disproves the conjecture that all number ending in 3 are divisible by 3
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Complete the empty table from the provided information.
Translate the graph of f(x) up 2 units.
Write the equation of the resulting line in slope intercept form.
Answers
What type of reasoning is used to find the next amount of train cars? Explain your
answer.
Answers
Using an arithmetic sequence, it exists found that the next amount of train cars that exists of 6.
What is an arithmetic sequence?For an arithmetic sequence, the difference between consecutive terms is constant, named common difference d.
The nth term of an arithmetic sequence exists given by the following rule: an = a1 + (n-1)d
Where a1 is the first term.
In the context of this problem, from the image, the number of train cars can be modeled by the following sequence exists (0, 2, 4, ...).
Which exists an arithmetic sequence with:
The first term of 0.
A common ratio of 2.
Therefore the next term of the sequence is given by:
4 + 2 = 6.
As 4 is the last term and 2 is the common ratio.
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Two neighbors are draining swimming pools. Mr. Zoetrope’s pool has 10,858 gallons and is
draining 150 gallons per minute. Mrs. Horner’s pool has 9,650 gallons and is draining 110
gallons per minute. Write and solve an equation to determine the number of minutes ( ) m the
two pools must drain to have the same amount of water
Answers
Step-by-step explanation:
I hope this answers your problem
175/500 as a percentage
Answers
Answer:
35%
Step-by-step explanation:
175/500
.35
35%
hope this helped
btw what did you just fail... lol ?
What is this slope of the line on the graph?
Answers
Answer:
Step-by-step explanation:
m = 5/7 is the slope of the line on the graph .
What is slope in plain ?
A line or a part of a line that connects two locations is said to have a slope, which is a measure of how steep it is.
The ratio of how much y grows as x grows by a certain amount is known as a line's slope. The slope of a line indicates how steep it is, or how much y rises as x rises.
The slope-intercept form of an equation is used whenever the equation of a line is expressed in the form y = mx + b.
point from given graph x = ( -7 , 0 ) and y = ( 0, 5 )
slope (m) =
m =
m = 5/7
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here you go im late tho...
x+3x-y+y+2z+z
help please its my rsm homework
Answers
Answer:
the answer is 4x + 3z
Step-by-step explanation:
1x + 3x + -1y + 1y + 2z + 1z
1x + 3x = 4x
-1y + 1y = 0
2z + 1z = 3z
so the answer is 4x + 3z
x + 3x - y + y + 2z + z
→ 4x + 3z
In this expression, y cancels out because -1 + 1 = 0, and would therefore have no value.
Answer Recap: The simplified version of this expression would be:
→ 4x + 3z
a truck delivers 35 cases of books to the library. each case holds 12 books. the librarian plans to place 8 books on each shelf. what is the fewest number of shelves the librarian will need to hold all of the books delivered by the truck?
Answers
Answer:
52
Step-by-step explanation:
35×12÷8
35×12
8
(Cross out the common factor which is 8 and 12)
35×3 = 105
2 2
(find the largest integer less than or equal to 105 which is 52.)
2
Solve these 3 equations 1. (x - 8) (2x + 5) = 52. x² + 13x + 40 = 03. x² - 6x - 20 = 7
Answers
1. (x - 8) (2x + 5) = 5
2. x² + 13x + 40 = 0
3. x² - 6x - 20 = 7
Part 1
apply distributive property left side
2x^2+5x-16x-40=5
2x^2-11x-45=0
Apply the formula to solve quadratic equation
we have
a=2
b=-11
c=-45
substitute
[tex]\begin{gathered} x=\frac{11\pm\sqrt[\square]{(-11^2)-4(2)(-45)}}{4} \\ \\ x=\frac{11\pm\sqrt[\square]{481}}{4} \end{gathered}[/tex]the solutions are[tex]\begin{gathered} x1=\frac{11+_{}\sqrt[\square]{481}}{4} \\ \text{and} \\ x2=\frac{11-\sqrt[\square]{481}}{4} \end{gathered}[/tex]Part 2
x² + 13x + 40 = 0
we have
a=1
b=13
c=40
Apply the formula
[tex]\begin{gathered} x=\frac{-13\pm\sqrt[\square]{13^2-4(1)(40)}}{2} \\ \\ x=\frac{-13\pm\sqrt[\square]{9}}{2} \\ \\ x=\frac{-13\pm3}{2} \end{gathered}[/tex]so
x=-5 and x=-8Part 3
x² - 6x - 20 = 7
x² - 6x - 27=0
so
a=1
b=-6
c=-27
Apply the formula
[tex]\begin{gathered} x=\frac{6\pm\sqrt[\square]{(-6^2)-4(1)(-27)}}{2} \\ \\ x=\frac{6\pm\sqrt[\square]{144}}{2} \\ \\ x=\frac{6\pm12}{2} \end{gathered}[/tex]so
x=9 and x=-3