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3 years ago

I need help on number 4?

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

8 0

They would have 2 because is it 10:1 just double it to be 20:2

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How to write 7/8 as a percent

Reil [10]

First, you'd have to turn the fraction into a decimal.You would divide the numerator by the denominator. 7/8=0.875
Now, you turn the decimal to a percent.
You move the decimal point two places to the right.
087.5
87.5% would be your answer.

8 0

4 years ago

Read 2 more answers

Help please. I'll give you Brainliest and offer a lot of points.

kompoz [17]

Answer:

c)124

Step-by-step explanation:

3*2+7*8+12*4=124

3 0

3 years ago

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sam invested $300 in a bank account that earns simple interest. he earns $24 at the end of 12 months. how much money will ben re

weeeeeb [17]

Answer:$48

Step-by-step explanation: since dollar amount doubles but timeframe doesn’t and interest remains the same rate just double amount of interest earned.

4 0

3 years ago

Which choice is equivalent to the product below?

Igoryamba

The answer should be
C

7 0

4 years ago

In an article appearing in Today’s Health a writer states that the average number of calories in a serving of popcorn is 75. To

statuscvo [17]

Answer:

$t = 1.9166$

The nutritionist does not have sufficient evidence to reject the writers claim

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 75$

The sample size is $n = 20$

The sample mean is $\= x = 78$

The standard deviation $\sigma = 7$

The level of significance is $\alpha = 0.05$

Now the

Null Hypothesis is $H_o : \mu = 75$

Alternative Hypothesis is $\mu \ne 75$

generally the degree of freedom is mathematically represented as

$df = n-1$

$df = 20 -1$

$df = 19$

For a significance level of 0.05 and 19 degrees of freedom, the critical value for the t-test is 2.093. This is obtain from the t-distribution table

The test statistic is mathematically evaluated as

$t = \frac{ \= x - \mu }{\frac{\sigma }{\sqrt{n} } }$

substituting values

$t = \frac{78 - 75 }{\frac{7 }{\sqrt{20} } }$

$t = 1.9166$

Since the test statistic is below the critical value then the Null hypothesis can not be rejected

So we can conclude that the nutritionist does not have sufficient evidence to reject the writers claim

7 0

3 years ago