3 years ago

Different forms of numbers three hundred twelve

Mathematics

1 answer:

Tanzania [10]3 years ago

4 0

312? Is this what ur asking

You might be interested in

The scores on a psychology exam were normally distributed with a mean of 60 and a standard deviation of 10 . A failing grade on

tensa zangetsu [6.8K]

Answer:

The cutoff for a failing score was 40,

Approximately 2.3% of the students failed.

Step-by-step explanation:

Given,

Mean, $\mu=60$

Standard deviation, $\sigma=10$

Let x represents the cutoff for a failing score,

Thus, according to the question,

$\frac{x-\mu}{\sigma}=-2$

$\frac{x-60}{10}=-2$

$x-60=-20$

$x=-20+60$

$x=40$

Thus, the cutoff for a failing score is 40,

∵ P(<-2) = 0.02275 = 2.275 % ≈ 2.3 %

Hence, Approximately 2.3 % of the students failed. 

7 0

3 years ago

Sheryl's boss at always 21 pays a 5% commission on all sales. If Sheryl sells $140 worth of clothes, how much commission does sh

mariarad [96]

Answer:

She earns $7.

Step-by-step explanation:

5 percent of 140 is 7. You can think of this as taking ten percent of 140.0 by moving the decimal point one place to the left, 14, and then since 10 divided by 2 is 5, divide that by 2 and you get 7.

4 0

3 years ago

Evaluate. Write your answer as a fraction or whole number without exponents. 2^-2

wlad13 [49]

Answer: 1/2

Step-by-step explanation: turns into 1/2^2 = 1/4

3 0

3 years ago

Read 2 more answers

Please help !!!!!!!!!!!!

Alekssandra [29.7K]

its the third one hope this helped on your NWEA test

Step-by-step explanation:

4 0

3 years ago

What is the equation that describes this rule - 0,-1,-2,-3,-4...

coldgirl [10]

Answer: x=y-1

Step-by-step explanation:

4 0

3 years ago