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3 years ago

Can someone tell me if my answer to this problem is correct, please? And if it isn't how do you solve it?

Mathematics

1 answer:

Mrac [35]3 years ago

3 0

Answer:

Height of tree= 13.8m

Step-by-step explanation:

When finding the value of a in your working, I suggest to leave the answer to 5 significant figures so that your final answer is more accurate. The value of a should be 26.048m to 5 s.f.

Then multiplying 26.048 with sin 32° would give you 13.8m too when rounded off to 3 significant figures :)

I have attached my working too.

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The circumference of a circle is 15 pie centimeters. What is the area of the circle in terms of pie

Jobisdone [24]

Answer:

Step-by-step explanation:

The circumference (C) of a circle = 2πr ← r is the radius

Given C = 15π the equating gives

2πr = 15π ( divide both sides by 2π )

r = $\frac{15}{2}$ = 7.5 cm

The area (A) of a circle is calculated using the formula

A = πr² = π × 7.5² = 56.25π cm² → C

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aleksandrvk [35]

Answer:

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Step-by-step explanation:

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Can someone tell me if my answer to this problem is correct, please? And if it isn't how do you solve it? ​

Can someone tell me if my answer to this problem is correct, please? And if it isn't how do you solve it?