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3 years ago

a photograph that measures 20 cm by 15 cm is enlarged so that its length becomes 28 cm. what does the width become?

Mathematics

2 answers:

NemiM [27]3 years ago

8 0

The width becomes 21 centimeters hope this helps:)

fenix001 [56]3 years ago

6 0

$\frac{width}{distance} = \frac{15}{20} = \frac{3}{4}$

This means that ,assumining the dimensions stay the same, the width will be equal to three quaters of the length

∴ When length=28cm
width = 0.75 × 28 = 21cm

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4 years ago

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We are given that Breyers is a major producer of ice cream and would like to test if the average American consumes more than 17 ounces of ice cream per month.

A random sample of 25 Americans was found to consume an average of 19 ounces of ice cream last month. The standard deviation for this sample was 5 ounces.

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Alternate Hypothesis, $H_A$ : $\mu$ > 17 ounces {means that the average American consumes more than 17 ounces of ice cream per month}

The test statistics that will be used here is One-sample t test statistics as we don't know about population standard deviation;

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s = sample standard deviation = 5 ounces

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So, test statistics = $\frac{19-17}{\frac{5}{\sqrt{25} } }$ ~ $t_2_4$

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Therefore, we conclude that the the average American consumes less than or equal to 17 ounces of ice cream per month.

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