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Nadya [2.5K]
3 years ago
5

Work out surface area of this sphere give your answer in to 1 DP

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
7 0

Answer:

84.9

Step-by-step explanation:

SA: 4×pi×r^2

the radius is the line (2.6cm)

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Solve for x on the interval 0≤x&lt;2pi<br><br> cos(3x)=1/2
Ede4ka [16]

We will see that the solution in the given interval is: x = 0.349 radians.

<h3>How to solve equations with the variable in the argument of a cosine?</h3>

We want to solve:

cos(3*x) = 1/2

Here we must use the inverse cosine function, Acos(x). Remember that:

cos(Acos(x)) = Acos(cos(x)) = x.

If we apply that in both sides, we get:

Acos( cos(3x) ) = Acos(1/2)

3*x = Acos(1/2)

x = Acos(1/2)/3 = 0.349

So x is equal to 0.349 radians, which belongs to the given interval.

If you want to learn more about trigonometry, you can read:

brainly.com/question/8120556

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2 years ago
The revenue, in dollars, that eMathInstruction makes off its videos in a given day depends on how many views they receive. If x
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Answer:

183590

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1/2(360000)+6(600)-10

180000+3600−10

183590

5 0
3 years ago
Your school district cancels schools when more than 2.5 inches of snow accumulate on the ground each hour. Snow is currently acc
kari74 [83]

Answer:

Extra snow needed > 0. 3 inch

Step-by-step explanation:

Given that:

Cancelation occurs when > 2.5 inch of snow accumulates each hour

Accumulation rate = 11/5 inch per hour

Extra snow Accumulation needed to cancel. School ;

Extra snow needed > cancelation volume - current rate

Extra snow needed > (2.5 - 11/5)

Extra snow needed > 0. 3 inch

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3 years ago
HELP IM BEING TIMED, ILL MARK BRAINLIEST.
Delicious77 [7]

Answer:

i think its b but im sorry if im wrong

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Sally dug a hole 5 feet deep to plant roses. She
ikadub [295]

Step-by-step explanation:

here will take the earth's surface as 0.

hence,

the first hole that Sally dug is 5 feet below the surface making its integer -5

the second hole Sally dug was 8 feet below the surface making its integer -8

therefore, the roses are closest to the surface.

8 0
2 years ago
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