Answer:576 minutes
Step-by-step explanation:
A study on students drinking habits wants to determine the true average number of alcoholic drinks all uf greek students have in a one week period. We know from preliminary studies that the standard deviation is around 6. 3. How many students should be sampled to be within 0. 5 drink of population mean with 95% probability?.
Number of students need to be sampled = 610
A study to determine the true average number of alcoholic drinks consumed by Greek students is conducted.
Standard Deviation, σ = 6.3
Margin Error of population mean, E = 0.5
Probability = 95% = 0.95
The p-value corresponding to 0.95 probability = (1+0.95)/2 = 0.975
The z-score corresponding to this p-value = 1.96 [from the z-tables]
Now, The margin error, E = zσ/√n, where n is the sample size
⇒ n = (zσ/E)²
⇒ n = (1.96 x 6.3/0.5)²
⇒ n ≈ 610
Hence 610 students need to be sampled.
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2. Expand each of the following functions in ascending powers of x up to the term in
x³. In each case state the values of x for which the expansion is valid.
Values of x in ascending orders is shown below.
What are exponents?The number of times a number has been multiplied by itself is referred to as an exponent. For instance, the expression 2 to the third (written as 2³) signifies 2 x 2 x 2 = 8. 2³ and 2 x 3 = 6 are not equivalent. Keep in mind that any number is itself when raised to the power of 1. Exponents and powers can be used to represent extremely big or extremely small numbers in a more straightforward fashion. To illustrate 3 x 3 x 3 x 3 in a straightforward manner, for instance, we could write it as 34, where 4 is the exponent and 3 is the base. It is claimed that the entire statement 34 has power.
Given Data
Expanding the exponents,
[tex]\sqrt{4+x}[/tex]
[tex]4^{1/2}[/tex] + [tex]x^{1/2}[/tex]
2) [tex]\frac{1}{2+x}[/tex]
2⁻¹ + x⁻¹
3) (3-2x)⁻²
(9)⁻¹ - 4x⁻²
4) (8 - 3x)¹⁾³
2 - [tex]3x^{1/3}[/tex]
In Ascending order,
(3-2x)⁻², [tex]\frac{1}{2+x}[/tex] , ([tex]8-3x^{1/3}[/tex]) , [tex]\sqrt{4+x}[/tex]
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what is the probability that maximum speed differs from the mean value by at most 2.5 standard deviations? (round your answer to four decimal places.)
The probability that maximum speed differs from the mean value by at most 2.5 standard deviations is 0.8473
Let the required probability that the maximum speed of mopeds differs from the mean speed by 2.5 standard deviations be given by P(U±2.5).
Mean speed U =46.7km/hr
P(46.7±2.5) = (44.2<= X <=49.2)
= P( 44.2<= Z <= 49.2)
= P(44.2 - 46.7/1.75 <= Z <= 49.2- 46.7/1.75)
= P( - 1.4286 <= Z <= 1.4285)
= P(1.4285) - P(-1.4285)
= P(1.43 ) - P(-1.43)
= 0.92364 - 0.07636
= 0.8473
Thus the probability that maximum speed differs from mean value by at most 2.5 standard deviations is 0.8473
the question is incomplete and the full question is "Mopeds (small motorcycles with an engine capacity below 50 cm3) are very popular in Europe because of their mobility, ease of operation, and low cost. Suppose the maximum speed of a moped is normally distributed with a mean value of 46.7 km/h and a standard deviation of 1.75 km/h. Consider randomly selecting a single such moped
What is the probability that maximum speed differs from the mean value by at most 2.5 standard deviations? (Round your answer to four decimal places.) You may need to use the appropriate table in the Appendix of Tables to answer this question"
problem on mean and standard deviation
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Need help ASAP! will give brainliest!
Answer:
first one.
Step-by-step explanation:
the slope of the line is the rise over run, in triangle STU this is 3 over 2
in triangle FED this is 6 over 4, which simplifies to 3 over 2
proving that the slope of the line is constant.
Which number is most likely an irrational number?
OA. -33.948826765...
B. 10.600000000...
O C. -6.099999999...
OD. 0.874874874...
The answer is A because it's a non-recurring decimal.
Simplify m^9 m^−3.
A. -m^12
B. 1 / m^27
C. 1 / m^6
D. m^6
I will the law of exponents:
[tex]x^{n} *x^{m} \\=x^{n+m}[/tex]
⇒[tex]=m^{9+(-3)} \\=m^{9-3}\\ =m^{6}[/tex]
Option D is the answer
What symbol makes -3/4 and -11/12 a true sentence?
Answer: -3/4>-11/12
Step-by-step explanation:
its a negative so there's more of the -3/4 than the -11/12 because the -11/12 is 2 more units below the -3/4
What kind of transformation converts the graph of f(x)=3x+9 into the graph of g(x)=3x–10?
Answer:
See below
Step-by-step explanation:
To get from +9 to -10 you will need to shift DOWN 19 units
Graph the image of the figure using the transformation given.
A graph of the image of figure Q'R'S'T' after a dilation of 2 units about the origin is: graph C.
What is dilation?Dilation simply refers to a type of transformation which changes the size of a geometric object, but not its shape. This ultimately implies that, the size of the geometric object would be increased or decreased based on the scale factor used.
What is scale factor?A scale factor can be defined as the ratio of two (2) corresponding length of sides or diameter in two similar geometric figures such as triangles.
Note: Each interval on this graph represents 1 unit.
For the given coordinates, the dilation with a scale factor of 2 about the origin or a center of dilation (0, 0) should be calculated as follows:
Point Q (-2, -1) → Point Q' (-2 × 2, -1 × 2) = Point Q' (-4, -2).
Point R (-1, 2) → Point R' (-1 × 2, 2 × 2) = Point R' (-2, 4).
Point S (1, 0) → Point S' (1 × 2, 0 × 2) = Point S' (2, 0).
Point T (2, -2) → Point T' (2 × 2, -2 × 2) = Point T' (4, -4).
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What is equivalent to 4x-3y=15
Answer: y = 4/3 x - 5
Step-by-step explanation: trust me
Help with 4.), 5.), 8.), 10.), 12.) ? It due at 8:00, it’s 5:12 rn
Answer:
see explanation
Step-by-step explanation:
(4)
6 = hj + k ( subtract k from both sides )
6 - k = hj ( isolate j by dividing both sides by h )
[tex]\frac{6-k}{h}[/tex] = j
(5)
[tex]\frac{v}{w}[/tex] = 9 ( multiply both sides by w to clear the fraction )
9w = v ( divide both sides by 9 )
w = [tex]\frac{v}{9}[/tex]
(8)
A = [tex]\frac{1}{2}[/tex] bh ( multiply both sides by 2 to clear the fraction )
2A = bh ( divide both sides by h )
[tex]\frac{2A}{h}[/tex] = b
(10)
V = [tex]\frac{1}{3}[/tex] πr²h ( multiply both sides by 3 to clear the fraction )
3V = πr²h ( isolate h by dividing both sides by πr² )
[tex]\frac{3V}{\pi r^2}[/tex] = h
(12)
V = πr²h ( isolate r² by dividing both sides by πh )
[tex]\frac{V}{\pi h}[/tex] = r² ( take square root of both sides )
[tex]\sqrt{\frac{V}{\pi h} }[/tex] = r
Marc usually rides his bike to school. He leaves his house and
goes east to the park and then turns south and continues until he
reaches school. How many blocks does he ride to get to school?
Answer:2 blocks
Step-by-step explanation:
because just trust me
The amounts of e-waste generated in a region during two years were 14,200,000 tons and 10,700,000 tons. What was the total e-waste generated over these two years in the region, expressed in scientific notation? (5 points)
Group of answer choices
2.49 ⋅ 1014 tons
2.49 ⋅ 107 tons
24.9 ⋅ 1014 tons
24.9 ⋅ 107 tons
The total e-waste generated over these two years in the region, expressed in scientific notation, is B. 2.49 x 10^7 tons.
What is a scientific notation?Scientific notation is a standard form of expressing a short or large number in a decimal form.
Scientific notation involves writing a number that is greater than 1 but less than 10 with the power of 10.
Correct scientific notations express numbers as products of a number between 1 and 10 multiplied by an appropriate power of 10 based on its place value in the given decimal.
Thus, the total e-waste generated cannot be expressed in scientific notation as Options A, C, or D because these do not comply with the rules of scientific notations, unlike Option B.
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Hello! What graph could be used to find the solutions to the system of equations? Thanks for your help!
The Solution:
Given:
[tex]\begin{gathered} y=\frac{2x-2}{x-3} \\ \\ x-y=1 \end{gathered}[/tex]Required:
To determine the graph that represents the given system.
Below is the graph of the given system:
Therefore, the correct answer is [ option 2 ]
) Write 2350 million in standard form.
The segments shown below could form a triangle?
Answer:
yes
Step-by-step explanation:
it would form a acute triangle.
What integer would represent a withdrawal of $170?
Answer:
-170
Step-by-step explanation:
we are withdrawing so minus from original amount
16 is a what percen of 200
Answer:
32
Step-by-step explanation:
May someone please help me! I have to submit this tonight and do not know how to do it or the answer may you please help me thank you!
On Tuesday, the mailman delivers three check for $5 and two bills for $2 each. If you had a starting balance of $25, what is the ending balance?
PLEASEEE HELP ME ON THIS QUESTION! I HAVE TO SUBMITTHIS IN A BIT PLEASE HELP! :))
Answer: 196.5 lbs
Step-by-step explanation:
[tex]237-9(4.5)=196.5[/tex]
The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).
5, 2, 5/3
Find the 10th Term
Answer:
-22
Step-by-step explanation:
10=a+9d
the first term is 5 and the common difference is -2
a=5
common difference=-3
5+9(-3)
5+(-27)
5-22
answer is -22
The equation for lines can be written as y=–10x+5/4. Parallel to line's is line t, which passes through the point (1,3). What is the equation of line t?
Step-by-step explanation:
what I understood :
line s : y = -10x + 5/4
the slope is always the factor of x (here : -10).
a parallel lines must have the same slope.
line t : y = -10x + b
to get b we use the coordinates of the given point :
3 = -10×1 + b = -10 + b
13 = b
line t : y = -10x + 13
what is x when 2x + 5 = 15
period ahh period uhh
Answer:
x=5
Step-by-step explanation:
2x + 5 = 15
2x5=10
5+10=15
Hopes this helps
Answer:
x = 5
Step-by-step explanation:
2x + 5=15 Set up equation
2x= 15-5 Put like terms together
2x= 10 Subtract like terms
x= 10/2 Isolate and divide
x= 5 Answer
Question 8 of 10Which is not a characteristic of the linear parent function?A. The range is positive real numbers (y> 0).B. It goes through the origin.OC. It has a slope of 1.OD. The domain is all real numbers.SUBM
Let's determine the statement which is not a characteristic of the linear parent function.
The linear parent function has the form:
[tex]y=x[/tex]We have the graph below:
The function has the following properties:
• The line goes through the origin.
,• It has a range of all real numbers
,• It has a domain of all real numbers
,• It has a slope of 1.#
Therefore, the statement which is not a characteristic of the linear parent function is:
• The range is positive real numbers (y > 0).
ANSWER:
• A. The range is positive real numbers (y> 0)
25 > w - 7 solve the inequality for w and simplify your answer as much as possible
Step-by-step explanation:
so when we have 25> w -7 we must move the
-7 to the 25 for the w to stand on it own so
25+7 > w
32 > w
Elena drank 3 liters of water yesterday. Jada drank 3/4 times as much
water as Elena. Lin drank twice as much water as Jada.
1. How much water did Jada drink?
2. How much water did Lin drink?
liters
liters
20. sarah and gabe are sharing a sheet of stickers. Sara has 2/7 of the sheet. Gabe has 1/4 of the sheet. What fraction of the sheet do sara and gabe have together?
(2x - y)² =
(3x-1)(3x+5)=
Please help simplify both problems !
Answer: 4x^2 - 4xy + y^2 and the second one 9x^2 + 12x - 5
I hope this helps
f(x)= 3x; translation up 5 units
After applying the given translation we get the function as 3x + 5
Graph translation is the process of converting an equation or existing graph into a new graph.
One common type of algebraic issue is changing algebraic equations.
A parent function's graph is altered by a translation. The three different types of translation are dilations, reflections, and translations.
A function can have its y-values modified vertically or its x-values changed horizontally (affects the x-values).
We are aware that the x- and y-coordinates must be modified to reflect the translation by the specified amount.
f( x ) = 3x is translated 5 units upwards.
Therefore the required graph is f ( x ) = 3x + 5 .
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