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3 years ago

6

Daniella has money automatically deposited into a savings account each week. after 3 weeks, she has $18. After 5 weeks, she has

$30. the unit rate is measured in dollars per week. what is the constant of proportionality.

1 answer:

balandron [24]3 years ago

3 0

Answer: 6 dollars

Step-by-step explanation:

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For one History test, Keith had to answer 40 questions. Of these 40 questions, Keith answered 28 of them correctly. What percent

muminat

Answer:

Keith scored 70% on the History test.

Step-by-step explanation:

We have been given that for History test, Keith had to answer 40 questions. Of these 40 questions, Keith answered 28 of them correctly.

To find the percentage Keith got on History test, we will have to figure out 28 is what percent of 40.

$\text{Percentage scored by Keith on History test}=\frac{28}{40}\times 100$

$\text{Percentage scored by Keith on History test}=0.7\times 100$

$\text{Percentage scored by Keith on History test}=70$

Therefore, Keith scored 70% on the History test.

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Step-by-step explanation:

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An environmental group at a local college is conducting independent tests to determine the distance a particular make of automob

melomori [17]

Answer:

$26.5265$

Step-by-step explanation:

<u>Confidence Interval</u>

When the population standard deviation $\sigma$ is known, the formula for a confidence interval for a population mean $\bar x$ is:

$\displaystyle \bar x \pm z\frac{\sigma}{\sqrt{n}}$

Where n is the sample size and z is the corresponding z-value from the standard normal distribution for the selected confidence level. The value of z for a 95% confidence interval is z=1.96. The rest of the values are

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Calculating the confidence interval

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$\displaystyle 28.2 \pm 1.6735$

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$26.5265$

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