What it bigger 40% of 90 or half of 80

1 answer:

Ber [7]3 years ago

6 0

$p\%=\frac{p}{100}\\\\40\%=\frac{40}{100}=\frac{4}{10}=0.4\\\\40\%\ of\ 90=0.4\cdot90=\fbox{36}\\\\half=\frac{1}{2}=0.5\\\\half\ of\ 80=0.5\cdot80=\fbox{40}\\\\therefore,\ bigger\ is\ \boxed{half\ of\ 80}$

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3 years ago

(20 pts!) if the base of the roof has length 40 feet and x=30, which of the following gives the height of the roof?

musickatia [10]

Answer:

23.094 ft approximately

(If you want your answer in a different format, let me know please.)

Step-by-step explanation:

I would have solve this using tangent since the side opposite to x is asked for and the adjacent side to side is given as having a measurement of 40 ft.

But I think they want you to use the formula:

$l=\frac{b}{\cos(x)}$ .