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3 years ago

I'm not sure at all how to do this

Mathematics

1 answer:

Greeley [361]3 years ago

6 0

Answer:

Step-by-step explanation:

Cos(Ф) = Adj / Hyp

Cos(Ф) = Adj / 5

use Pythagoras's

$5^{2}$ = $2^{2}$ + $x^{2}$

25 - 4 = $x^{2}$

21 = $x^{2}$

$\sqrt{21}$ = x

Cos(Ф) = $\sqrt{21}$ / 5

(using the square root means the answer is exact. so leave it like that.)

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Please help don’t get it ASAP

maxonik [38]

Answer:

Option C is correct.

$38 miles$

Step-by-step explanation:

Let x be the distance cover by Michelle

Given:

A circle diameter is 3 miles.

And Michelle biked around the trail 4 times.

We know that

The circumference of a circle.

circumference = $2\pi r$ ----------(1)

where $r=\frac{Diameter}{2}$

$r=\frac{3}{2} \\r=1.5$ miles

Put $\pi =3.14$ and r value in equation 1.

$circumference = 2\times 3.14 1.5$

$circumference = 9.42 mil;es$

The circumference of a circle is 9.42 miles.

And Michelle biked 4 times, that is equal to 4 $\times$ circumference.

$x = 4\times 9.42$

$x = 37.65 miles$ .

That is equal to 38 miles.

Therefore, Michelle biked around 4 trail is 38 miles.

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3 years ago

I'm not sure at all how to do this​

I'm not sure at all how to do this