Question #b787b

Nov 16, 2017

For the first question, the answer is $\text{0.28 cm}$. This would be $\text{2.8 mm}$.

Explanation:

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

$\text{28 cm = 100 years}$

$\left(\text{28 cm"/x) = ("100 yr"/"1 yr}\right)$

Here $x$ is the cm grown.

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

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

Divide by $\text{100 yr}$ and you will end up with

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

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

Hope this helped.