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hammer [34]
2 years ago
13

Help please i’m confused

Mathematics
1 answer:
morpeh [17]2 years ago
7 0

Answer:

7/10 pi (radians)

Step-by-step explanation:

The formula for sector area is (angle * r^2)/2

140pi = angle*r^2/2

multiply both sides by 2

280pi = angle * r^2

r = 20 cm (substitute)

280pi = angle * (20)^2

280pi = angle * 400

Divide both sides by 400

7/10 pi = angle

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ch4aika [34]

Answer:

11.45 lumens

Step-by-step explanation:

We are given that

log(I/12)=-0.00235x

Where x=Depth

I=Intensity of light

We have to find the intensity of the light at a depth of 20 feet.

Substitute the value of x

log(I/12)=-0.00235\times 20

log(I/12)=-0.047

\frac{I}{12}=e^{-0.047}

I=12e^{-0.047}

I=11.45 Lumens

Hence, the intensity of the light (in lumens) at a depth of 20 feet=11.45 lumens

4 0
2 years ago
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elena-14-01-66 [18.8K]

Answer:

c

Step-by-step explanation:

3 0
3 years ago
PLEASE ANSWER I NEED THIS ASAP
Rudik [331]
It would also be 42 because the triangle is divided in half.
5 0
3 years ago
Read 2 more answers
Which ratio is greater than 16?<br> A.22:32<br> B.3:8<br> C.1:2<br> D.3:4
Zielflug [23.3K]

Answer:

B: 3:8

Step-by-step explanation:

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7 0
3 years ago
−15 ÷ 5 =
jekas [21]

Answer:

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6 0
3 years ago
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