Answer:
Both students scored in the top 10% of their classes.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
In this question:
Top 10% = Above the 100 - 10 = 90th percentile.
The 90th percentile of scores is X when Z has a pvalue of 0.9, that is, Z = 1.28.
So, the student who had a z-score above 1.28 scored in the 90th percentile of their class.
In student A's class the mean was 78 and the standard deviation of 5. He scored 87.
We have that [tex]\mu = 78, \sigma = 5, X = 87[/tex]
Then
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{87 - 78}{5}[/tex]
[tex]Z = 1.8[/tex]
1.8 > 1.28, so student A scored in the top 10% of his/her class.
Student B's class the mean was 76 with a standard deviation of 4. Scored 87.
We have that [tex]\mu = 76, \sigma = 4, X = 87[/tex]
Then
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{87 - 76}{4}[/tex]
[tex]Z = 2.75[/tex]
2.75 > 1.28, so student B also scored in the top 10% of his/her class.
Both students scored in the top 10% of their classes.
Multiple choice: which function has an amplitude of 5 and a period of π/3 ?
A) f(x)=5 cos 6x
B) f(x)=1/5 cos6x
C) f(x)=5 cos 2/3 x
D) f(x)=3 cos5x
The correct answer is C) f(x) = 5 cos 2/3 x, as it has an amplitude of 5 and a period of π/3. To determine which function has an amplitude of 5 and a period of π/3, we need to analyze the properties of the trigonometric functions presented in the options.
The general form of a cosine function is f(x) = A cos(Bx), where A represents the amplitude and B represents the frequency or period of the function.
Option A) f(x) = 5 cos 6x: This function has an amplitude of 5, but its period is 2π/6, which is not equal to π/3. So, this option is not the correct answer.
Option B) f(x) = 1/5 cos 6x: This function has an amplitude of 1/5, which is not 5 as required. Therefore, this option is not the correct answer.
Option C) f(x) = 5 cos 2/3 x: This function has an amplitude of 5, which matches the given condition. Moreover, its period is 2π/((2/3)x) = π/3, which is the desired period. Hence, this option satisfies both conditions.
Option D) f(x) = 3 cos 5x: This function has an amplitude of 3, which is not 5 as required. Thus, this option is not the correct answer.
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HELP I GOT THIS WRONG AND IM NOT SURE WHICH IS CORRECT. Thank you!!
Answer:
Its Alternate Exterior Angle Theorem.
Step-by-step explanation:
Mr Goodwin finished grading his students homework at 4:12 PM if he spent an hour and 33 minutes doing this what time did he start
Answer:
2:21 pm
Step-by-step explanation:
Finished 4:12
He spent 1 hour and 33
4:12 - 1 hour 33
minus the hour
3:12
minus 33
12-33
2:21pm
PLS ANSWER ASAP! Only answer if you are sure that it is correct & no links or i will report you
What is the slope of the line through (-1, 8) (3, -4)
Answer:
D. -3
Step-by-step explanation:
I need help please.
Pls help i'm lost il give brainly
Answer:
a= 16
b= -8
c= 6
d= -16
e= -4
Step-by-step explanation:
Answer:
Step-by-step explanation:
A= 16 degrees
B= -8 degrees
C= 6 degrees
D= -16 degrees
E= -4 degrees
Investigate the parent function for y = x^2. Refer to the previous slide. Make sure a = 1, h = 0, and k = 0.
1. Parent Graph Name:
2. Parent Equation:
3. Interesting properties:(infection point, endpoints, maxima/minima, etc.
NOT A MULTIPLE CHOICE
9514 1404 393
Answer:
y=x^2 parent functiony=x^2vertex (minimum) at (0, 0); end behavior (-∞, ∞) and (∞, ∞)Step-by-step explanation:
1. You can call the graph whatever you like. Since you're graphing the parent function y=x², you might want that in the title.
__
2. The problem statement tells us we're graphing y = x².
__
3. The quadratic function has one turning point on the axis of symmetry. The turning point for the parent function is its vertex at (0, 0). This point is a minimum, because the parent function has a positive coefficient.
The function is even degree with a positive leading coefficient, so the end behavior tends to +∞ for x going to either -∞ or +∞.
_____
Additional comment
If we're to "refer to the previous slide", it would be nice to be able to see that slide. As is, we're guessing at what the question is really after. The basic y=x^2 function will have been studied first thing when nonlinear polynomials are introduced. This should all be very elementary stuff.
Bob has $2,500 in a savings account that earns 3 % annually. How much will he earn in interest in 1 year?
Use the formula = , where is the interest earned, is the principal (starting amount), is the interest rate expressed as a decimal, and is the time in years.
Answer:
the answer is 2575 I believe
Step-by-step explanation:
(2500x3x1/100)
(2500+75)
One number is seven more than four times another number. If the sum of the numbers is 22, find the numbers.
Answer:
the answer is actually study and you would know
Step-by-step explanation:
Answer:
3 and 19
Step-by-step explanation:
A game-show spinner has these odds of stopping on particular dollar values: 40% for $5, 25% for $100, 20% for $500, and 15% for $1000. What are the odds of a player winning $5 or $100?
Answer:
13÷ 23
Step-by-step explanation:
The computation of the odds of player winning is shown below;
For $5 it is 40%
And, for $100 it is 25%
so for total it is
= 40% + 25%
= 65%
And, the total percentage is 100%
So, the odds in favor is
65:100
13:20
Now for winning it would be 13÷ 23
pleas help. 10 pointssss
Answer:
6
Step-by-step explanation:
When a baby Giraffe was born it weight 150 Pounds over the next 5 years it gained Equal amounts of weight each year. The Giraffe now weight 675 pounds. How much was the weight gain per year?
Answer:
135 per year because 675 ➗ 5 = 135
Can someone help me how to do this task please?
Solve for x in -14x⁴ - 8x³ = 32
Answer:
No solutions
Step-by-step explanation:
There can be no solutions to your question
What is the area of the figure?
A.)24 square inches
B.)28 square inches
C.)45 square inches
D.)55 square inches
Answer:
24 square inches
Step-by-step explanation:
Based on the diagram or figure given, The area of the figure is known to be 24 square inches.
What is the area of a figure?The area of a figure is known to be the rate or the number of unit squares that is said to have cover the surface of a closed figure.
Note that the area is often measured in square units such as (cm²) and in the case above, the Based on the diagram or figure given, The area of the figure is known to be 24 square inches.
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HURRY IM TIMED!!!
Use this formula to solve this word problem. d=r*t Carolina wants to travel on a new maglev in Japan when she takes a trip this summer. If she takes the latest model which travels 352 mph, and it takes her 3.2 hours, how far did she travel? a. 112.6 miles c. 110 miles b. 1126 miles d. none of these
Answer:
352 mph
Step-by-step explanation:
cuz I'm super smart
Answer: 1126.4
Step-by-step explanation:
Rate times time, takes her 3.2 hrs and she travels 352, 3.2 times 352 is 1126.4
22yd 14 yd into square yards
Answer:
29.33
I thinks that right... lol :D
Forgive me if it wrong :(
Step-by-step explanation:
That is equivalent to 308 square yards. You can verify it on this website https://www.inchcalculator.com/square-yards-calculator/.
Find the length of “c” to the nearest tenth using the Pythagorean Theorem.
NO BOTS
Answer:
10.6
Step-by-step explanation:
you do 7 squared + 8 squared to get 113. the square root of 113 rounded to the nearest tent is 10.6
give me brainliest
Look at this square. Find the value of s.
Perimeter = 4 kilometers
S =
kilometers
Answer:
equivale 15. kilómetros. te lo aseguiro
VERY EASY, WILL GIVE 50 POINTS FOR CORRECT ANSWER ASAP AND WILL GIVE BRAINLIEST.
Answer:
F
Step-by-step explanation:
answer:
shape f !
step-by-step explanation:
hi there!
the question is asking us which shape matches shape a right, now if we look closely we already know that shapes d and b look like they match each other rather then shape a
shape a - 2, 2, 4
so they are out of the equation ( checking how long the sides are )
shape d - 3, 3, 3
shape b - 3, 3, 3
shapes e and c look like they match each other but just to make sure, i counted how long the each side was for both of them
( going by blocks )
shape c - 2, 3, 4,
shape e - 2, 3, almost 5
which does leave us left with shape f, but just to make sure.. lets count it!
shape f - 2, 2, 4,
which is the same numbers that shape a has!
shape f = shape a
hope this helps you!! and if i made a mistake reading the problem or doing the problem then please tell me :) have a good day
a pack of candy bars has 6 bars. Each bar weighs 3.86 ounces. How much does the pack weigh?
Answer:
23.16 punces
Step-by-step explanation:
6x3.86=23.16
Answer: 23.16 ounces
Step-by-step explanation:
If there are 6 candy bars that each weigh 3.86 ounces, you need to add up all of the weights to find the total pack weight. 6*3.86=23.16
*If by any chance you need your answer to be in pounds, divide the answer by 16 (16 ounces in a pound). 23.16/16= 1.45 pounds
“Finding side lengths and angle measures of isolceles and equilateral triangles”
help pls !
Answer:
a) 100
b) 7
Step-by-step explanation:
Remember that angle measurements correspond to side lengths. This also means that if two sides or angles are congruent, then the angle or side opposite of them will also be congruent. For example, in part a two sides are both 6. This means that the angles opposite of them are also both 40. Finally, to find <K subtract 80 (because that is 40+40) from 180. Therefore, the answer is 100 degrees.
Next, remember that the markings on the angles in part b mean that the angles are congruent. Since all the angles are congruent, the sides must be as well. So HI=7.
3/11 ÷ 3/11
what is the answer pls tell me
Answer:
1 is the answer.
(According to me)
Hope it helps!!!
2. Find the GCF of: - 4x^2 and 28x^3
Answer: 4x^2
Step-by-step explanation: Multiply that by -1 to get -4x^2 and multiply by 7x to get 28x^3
a rectangular piece of cardboard measuring 30 inches by 20 inches is made into an open box by first cutting an identical square from each corner and then folding up the sides. The edge of each identical square is a whole number.
What is the name of the relationship when a function of the form y = ab^x is
used to fit the data?
A. Correlation
B. Exponential regression
C. Linear regression
Answer:
Exponential Regression
Step-by-step explanation:
AP3X
The name of the relationship when a function of the form y = abˣ is used to fit the data is, ''Exponential regression''.
What is mean by Function?A relation between a set of inputs having one output each is called a function. and an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
We have to given that;
The function is,
⇒ y = abˣ
Now, We know that;
Exponential regression of the equation is of the form,
⇒ y = abˣ
Hence, The name of the relationship when a function of the form y = abˣ is used to fit the data is, ''Exponential regression''.
Option B is true.
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The table shows a dog’s weight over a 5-year period. Which graph could represent this data?
Answer:
A
Step-by-step explanation:
Answer:
top left
Step-by-step explanation:
what is the area of the triangle shown above
Answer:
I don't see the triangle...
PLEASE ANSWER FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
Jeff wants to form a garden that is in the shape of a triangle. He has two lengths of fence that are 19 feet long and 12 feet long. He says he will be able to form a triangular garden with a third length of fence that is 8 feet long. Is Jeff correct or incorrect in his reasoning? Explain.
Answer: Jeff is correct.
Step-by-step explanation:
The sum of the two sides of the triangle must greater than the longest side, which in this case, the longest side is 19 feet.
8 + 12 ? 19
20 > 19
Therefore, Jeff is correct.