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Zepler [3.9K]
3 years ago
13

Someone please help me

Mathematics
2 answers:
nadya68 [22]3 years ago
6 0
The formula is \pi rs+  \pi r^{2}, where s is slant height.

so,
= 3.14X4X7+3.14X4^{2}
= 87.92+50.24
= 138.16cm^{2}
babymother [125]3 years ago
5 0
There is a rounding error... So 138.16 cm^2 is the answer

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Solve for m and n<br> I been stuck on this question for an hour
Crazy boy [7]

Answer:

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Step-by-step explanation:

using the cosine and tangent ratio in the right triangle and the exact values

cos45° = \frac{1}{\sqrt{2} } and tan45° = 1 , then

cos45° = \frac{adjacent}{hypotenuse} = \frac{5\sqrt{2} }{m} = \frac{1}{\sqrt{2} } ( cross- multiply )

m = 5\sqrt{2} × \sqrt{2} = 5 × 2 = 10

-----------------------------------------

tan45° = \frac{opposite}{adjacent} = \frac{n}{5\sqrt{2} } = 1 , then

n = 5\sqrt{2}

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