A map scale in which 1.25 inches represents 250 miles. How many miles does 1 inch represent?

An English professor assigns letter grades on a test according to the following scheme. A: Top 15% of scores B: Scores below the

lisabon 2012 [21]

Answer:

59 to 66

Step-by-step explanation:

Mean test scores = u = 74.2

Standard Deviation = $\sigma$ = 9.6

According to the given data, following is the range of grades:

Grade A: 85% to 100%

Grade B: 55% to 85%

Grade C: 19% to 55%

Grade D: 6% to 19%

Grade F: 0% to 6%

So, the grade D will be given to the students from 6% to 19% scores. We can convert these percentages to numerical limits using the z scores. First we need to to identify the corresponding z scores of these limits.

6% to 19% in decimal form would be 0.06 to 0.19. Corresponding z score for 0.06 is -1.56 and that for 0.19 is -0.88 (From the z table)

The formula for z score is:

$z=\frac{x-u}{\sigma}$

For z = -1.56, we get:

$-1.56=\frac{x-74.2}{9.6}\\\\ x = 59$

For z = -0.88, we get:

$-0.88=\frac{x-74.2}{9.6}\\\\ x = 66$

Therefore, a numerical limits for a D grade would be from 59 to 66 (rounded to nearest whole numbers)

7 0

4 years ago

Colton has 888 comedy movies, 666 action movies, 555 fantasy movies, and 111 drama movie on his list of favorite movies.

eimsori [14]

Answer:

A. Comedy

Step-by-step explanation:

We are given that,

Movie type Number of movies

Comedy 8

Action 6

Fantasy 5

Drama 1

Then the total number of movies = 8+6+5+1 = 20

<h3>So, we will find the ratio of each type of movie out of total movies.</h3>

Ratio of comedy movies = $\frac{8}{20}=\frac{2}{5}$

Ratio of action movies = $\frac{6}{20}=\frac{3}{10}$

Ratio of fantasy movies = $\frac{5}{20}=\frac{1}{4}$

Ratio of drama movies = $\frac{1}{20}$

Since, we have,

<h3>Ratio of comedy movies = $\frac{8}{20}=\frac{2}{5}$ </h3>

Thus, 'For every 5 movies on the list, there are 2 COMEDY movies'.

So, option A is correct.

4 0

3 years ago

Read 2 more answers

JEN PURCHASED THE ITEM SHOWN IN THE TABLE IN THE CITY IN THE SALES TAX RATE IS 7.15 IN ANOTHER CITY THE SALES TAX RATE IS 6.35 H

Leona [35]

Answer:

Hewo Asuna here

I would love to help but there is no table

Step-by-step explanation:

7 0

3 years ago

A slide 4.1 meters long makes an angle of 35º with the ground. To the nearest tenth of a meter, how far above the ground is the

Step2247 [10]

length of the slide is lets say 'l' the height (h) opposite to the angle 28 is found by h=l*sin28 where sin28=0.47 approximately h=4.5*0.47 h=2.115m

4 0

4 years ago

The table displays the amount of money Stephen has in his piggy bank.

Serggg [28]

Answer:

The answer is 27%, 6/22, and 3/11.

Pls mark brainliest. :D

7 0

3 years ago