Question #b787b

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Question #b787b

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Answer 1 · 2017-11-16T04:54:53

For the first question, the answer is $0.28 cm$ $"0.28 cm"$ . This would be $2.8 mm$ $"2.8 mm"$ .

Explanation:

For this question, you can use a proportion to figure out your answer. So, you know that

$28 cm = 100 years$ $"28 cm = 100 years"$

$(\frac{28 cm}{x}) = (\frac{100 yr}{1 yr})$ $("28 cm"/x) = ("100 yr"/"1 yr")$

Here $x$ $x$ is the cm grown.

So, to solve this, you can cross multiply which would end up with,

$28 cm \times 1 yr = 100 yr \times x$ $"28 cm" xx "1 yr" = "100 yr" xx x$

Divide by $100 yr$ $"100 yr"$ and you will end up with

$\frac{28 cm}{100} = 0.28 cm$ $"28 cm"/100 = "0.28 cm"$

To convert this to millimeters, you multiply the $0.28$ $0.28$ cm by $10$ $10$ . This is the conversion of centimeters to millimeters. So the answer would be $2.8 mm$ $"2.8 mm"$ .

Hope this helped.

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