Look below to help please

Help plz ?????????????

Lyrx [107]

Answer:

3443

———— = C. 202

17

Step-by-step explanation:

Step 1 :

3443

Simplify ————

17

Final result :

3443

———— = 202.52941

17

Processing ends successfully

plz mark em as brainliest :)

8 0

3 years ago

Can someone please explain the steps to solve these questions.

Amiraneli [1.4K]

Alright! So to solve these questions, you need to find out the difference. You can use ratios to solve this. For example, question #25:

A class had 30 pupils at the beginning of this school term, but now has 5 more pupils. What is the percent of increase?

The question is basically asking how much 5 is in ratio to 30. So just divide 5 (the given amount) by 30 (the total amount). The answer is 0.16, or 16%

3 0

3 years ago

A professor gives her 100 students an exam; scores are normally distributed. The section has an average exam score of 80 with a

frozen [14]

Answer:

6.18% of the class has an exam score of A- or higher.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

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.

In this question, we have that:

$\mu = 80, \sigma = 6.5$

What percentage of the class has an exam score of A- or higher (defined as at least 90)?

This is 1 subtracted by the pvalue of Z when X = 90. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{90 - 80}{6.5}$

$Z = 1.54$

$Z = 1.54$ has a pvalue of 0.9382

1 - 0.9382 = 0.0618

6.18% of the class has an exam score of A- or higher.

4 0

3 years ago

The ratio of the number of girls to the number of boys in choir is 4 to 5. There are 32 girls in the choir. How many boys are in

TEA [102]

Answer:

what grade is this

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

You're at a clothing store that dyes your clothes while you wait. You get to pick from 4 pieces of clothing

Zielflug [23.3K]

1 / 12 is the probability that you'll end up with an orange hat.

Step-by-step explanation:

Given that,

There are 4 piece of clothing ⇒ shirt, pants, socks, or hat
There are 3 possible colors ⇒ purple, blue, or orange

To find the total number of outcome :

Total outcomes ⇒ (number of clothes) × (number of colors)

⇒ 4 × 3 = 12

Therefore, there will be 12 different possibilities.

The 12 different outcomes are :

⇒ Purple shirt, blue shirt, orange shirt

⇒ Purple pants, blue pants, orange pants

⇒ Purple socks, blue socks, orange socks

⇒ Purple hat, blue hat, and orange hat.

Now, the probability that you'll end up with an orange hat if you choose on random of 12 possibilities ⇒ No.of orange hats / Total no.of outcomes.

∴ P(orange hat) = 1 / 12

7 0

3 years ago