plz help asap (make sure to put a real explanation)​

Answer: Half the students weighed less than 7 pounds, 5 ounces, and half the students weighed more.

Step-by-step explanation:

Answer:

0.2333 = 23.33% probability this student's score will be at least 2100.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution, and conditional probability.

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 zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

Conditional Probability

We use the conditional probability formula to solve this question. It is

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]

In which

P(B|A) is the probability of event B happening, given that A happened.

[tex]P(A \cap B)[/tex] is the probability of both A and B happening.

P(A) is the probability of A happening.

SAT scores (out of 2400) are distributed normally with a mean of 1490 and a standard deviation of 295.

This means that [tex]\mu = 1490, \sigma = 295[/tex]

In this question:

Event A: Student was recognized.

Event B: Student scored at least 2100.

Probability of a student being recognized:

Probability of scoring at least 1900, which is 1 subtracted by the pvalue of Z when X = 1900. So

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{1900 - 1490}{295}[/tex]

[tex]Z = 1.39[/tex]

[tex]Z = 1.39[/tex] has a pvalue of 0.9177

1 - 0.9177 = 0.0823

This means that [tex]P(A) = 0.0823[/tex]

Probability of a student being recognized and scoring at least 2100:

Intersection between at least 1900 and at least 2100 is at least 2100, so this is 1 subtracted by the pvalue of Z when X = 2100.

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{2100 - 1490}{295}[/tex]

[tex]Z = 2.07[/tex]

[tex]Z = 2.07[/tex] has a pvalue of 0.9808

This means that [tex]P(A \cap B) = 1 - 0.9808 = 0.0192[/tex]

What is the probability this student's score will be at least 2100?

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.0192}{0.0823} = 0.2333[/tex]

0.2333 = 23.33% probability this student's score will be at least 2100.

Answer:

The correct answer is 10 pounds of chicken

Step-by-step explanation:

First you do 8 divided by 4 to equal the unit price of 1 pound of chicken for 2 dollars then you do 20 divided by 2 to equal 10 pounds of chicken for 20 dollars

HAVE A GOOD DAY!

Answer:

11 quarters- 2.75

22 nickels- 1.10

Answer:

its the first option

Step-by-step explanation:

Answer:

Step-by-step explanation:

65

Answer:

The people who said Yes to having a pet in their home is greater

Step-by-step explanation:

We are asked to compare 18% and 14/25. Let's get them to their lowest common denominator:

18% = 18/100

14/25 * 4 = 56/100

18/100 is clearly much less than 56/100. If you don't want to write all this out, you can also eyeball that 14/25 is over half, whereas 18% is not close to half.

I hope this helps! Sorry if its doesn't though:( I hope you have a amazing day! And maybe you could mark this brainly?

Answer:

x^(4/21)

Step-by-step explanation:

Answer:

D) 0.848

Step-by-step explanation:

Marginal Relative Frequency is when you divide the square(s) by the very total, in this case: 231.

Dividing 196/231, you get 0.848484 repeating.

Hope it helps!!!

Answer: yeah sry i need point

Step-by-step explanation:

Answer:

286 cm

Step-by-step explanation:

Answer:

286 centimeters³

Step-by-step explanation:

identify variable:   L=11    W=2      H=13

use volume of a rectangular prism formula:   V=LWH

substitute variables into formula:         V=(11)(2)(3)

V=286 cm³

Answer:

D.) "Yes, Mr. Yule’s sample is random and representative of the population."

Step-by-step explanation:

Answer:

read explanation

Step-by-step explanation:

this is a quadratic equation

first, move the 7x over to the other side so that we have 0 on one side

x^2+7x+12=0

now, we can factor

turn 7x into 3x and 4x, so x^2+3x+4x+12=0

you can turn x^2+3x into x(x+3) and 4x+12 into 4(x+3)

so, our new equation is x(x+3)+4(x+3)=0

that can be turned into (x+4)(x+3)=0 via the distributive property

so, either x+4 or x+3 has to be equal to 0

so, x is either -4 or -3

hope this helped

Answer:

a67y.....................

Answer:

15 cu ft

Step-by-step explanation:

figure A~figure B

4-->2 ft

10-->5 ft

3-->1.5 ft

V=2×5×1.5=15 cu ft

The volume of Figure B is  15 [tex]ft^{3}[/tex]

The RATIO OF SIMILARITY between any two similar figures is the ratio of any pair of corresponding sides. Simply stated, once it is determined that two figures are similar, all of their pairs of corresponding sides have the same ratio.

According to the question

Figure A ≈ Figure B

Therefore , ratio of corresponding sides have the same ratio .

Figure A              Figure B

4 ft                ⇒         2 ft  (given )

( As ratio of [tex]\frac{side\\\ of\\\ figure A}{side\\\ of\\\ figure B} = \frac{2}{1}[/tex] )

10 ft                ⇒        5 ft

3 ft                ⇒         1.5 ft

Now, volume of Figure B (which is cuboid ) =  Length * Breath * Height

                                                                       =  2 * 5 * 1.5

                                                                       =    15 [tex]ft^{3}[/tex]

Hence, the volume of Figure B is  15 [tex]ft^{3}[/tex]

To know more about  ratio of similarity here:

https://brainly.com/question/39796

#SPJ2

Answer:

212.5

Step-by-step explanation:

a=b*h/2

b=25

h=17

25*17 =425

425/2=212.5

a=212.5

Answer:

D) 5

Step-by-step explanation:

-12 + 8 + 9 = 5

Wouldnt that just be 75x2? bc if so then

The answer is:

75x2=150+ 850=1000

Answer:

14.6

Step-by-step explanation:

using the trigonometry ratio

cosine

cos35= 12/BC

BC= 12/cos35

BC = 14.64

Answer:

The recommended number of flowers is 32

Step-by-step explanation:

Given

The attached graph

Required

The number of flowers when area = 15

First, calculate the slope (m)

Considering

[tex](x_1,y1) = (12,60)[/tex]

[tex](x_2,y_2) = (15,20)[/tex]

[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

[tex]m = \frac{20-16}{15-12}[/tex]

[tex]m = \frac{4}{3}[/tex]

Considering:

[tex](x_1,y_1) = (15,20)[/tex]

[tex](x_2,y_2) = (24,y)[/tex]

The slope is:

[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

[tex]m = \frac{y - 20}{24 - 15}[/tex]

[tex]m = \frac{y - 20}{9}[/tex]

Recall that: [tex]m = \frac{4}{3}[/tex]

So:

[tex]\frac{4}{3} = \frac{y - 20}{9}[/tex]

Multiply through by 9

[tex]3*4 = y - 20[/tex]

[tex]y = 20 + 3 * 4[/tex]

[tex]y = 32[/tex]

Answer:

9750 min or 162.5 hours

Step-by-step explanation:

375 times 26 = 9750

Answer:

C) 24 cheerleaders

Step-by-step explanation:

20 last year

subtract 3 for those who decided not to join

20 -3 = 17

add 7 for those who joined

17 + 7 = 24

there are 24 cheer leaders

hope it help

Answer: I think it’s 2

Step-by-step explanation: because either of the sides are equal or the base and a side is not possible.

Aren’t you from CCA, Ryan Rivera, Maths 5th period.

Answer:

2

hope this helps

Answer:

Do you need the answer or the factor??

Step-by-step explanation:

Answer: -(5a+16)

Step-by-step explanation:

Answer:

166.66 pounds

Step-by-step explanation:

160/0.96=166.66667

This is how I remember doing these questions

Answer:

The answer to this question is 4

Step-by-step explanation:

Answer:

A. 42.57 and 42.58

42.579337.......