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3 years ago

Asha ran a race in 20.7 seconds. Katie ran the same race 0.25 seconds faster. how fast did Katie run the race?

Mathematics

1 answer:

DaniilM [7]3 years ago

4 0

Hey there!

$Answer:\boxed{20.95}$

$Explanation:$

To find the answer, we can add up the time from both people.

$20.7(20.70)+0.25=20.95$

$\boxed{20.95}\text{ is your answer.}$

Hope this helps!

$\text{-TestedHyperr}$

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Answer:

The reasonable value = 2.96 × 10^(-1) µW

Step-by-step explanation:

* Lets explain how to solve the problem

- A mobile base station in an urban environment has a power

measurement of 8 µW at 225 m

- The propagation follows an inverse cube power law

- We need to find the reasonable value to assume at a distance

678 m from the base station

∵ The propagation follows an inverse cube power law

- The power would have been decreased by a factor 1/n³

times the power as a distance increasing

∵ n = the ratio between the distances

∵ The distance are 675 m and 225

∴ n = 675/225 = 3

∴ 1/n³ = 1/3³ = 1/27

- The reasonable value is the product of the power measurement of

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∴ The reasonable value = 8 × 1/27 = 8/27 µW = 0.296296

∴ The reasonable value = 2.96 × 10^(-1) µW

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3 years ago

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3 years ago

A $1508 award is shared equally by 8 people. What is each persons share of the award

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Answer:

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6. A car dealership would like to estimate the mean mpg of its new model car with 90% confidence. The population is normally dis

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Answer:

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Step-by-step explanation:

Using the formula for calculating the confidence interval expressed as:

CI = xbar ± Z * S/√n where;

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Z is the z-score at 90% confidence interval

S is the sample standard deviation

n is the sample size

Given parameters

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Z at 90% CI = 1.645

S = 10.70.

n = 25

Required

90% confidence interval for the population mean using the sample data.

Substituting the given parameters into the formula, we will have;

CI = 96.52 ± (1.645 * 10.70/√25)

CI = 96.52 ± (1.645 * 10.70/5)

CI = 96.52 ± (1.645 * 2.14)

CI = 96.52 ± (3.5203)

CI = (96.52-3.5203, 96.52+3.5203)

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