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Levart [38]
4 years ago
8

The area of a circle depends on the radius. Use the equation A(r) =pi r2 to compute A(7). Round your answer to the nearest hundr

edth.
Mathematics
1 answer:
Colt1911 [192]4 years ago
5 0
The equation is given to compute A(7) = A(r) pi r²
7 = pi r²
r² = 7/pi
value of pi = 3.14
so,
r² = 7/3.14
r = √ (7/3.14)
r = 1.49
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the moon is about 240,000 miles from earth. what is this distance written as a whole number multiplied by a power of ten.?
Sphinxa [80]
24 (being the part of the number that was first) would be multiplied by 10000, note the fact that the amount of zeros multiplied was equal to the amount of zeros in the problem.

Thus

240,000  = 24 x 10,000.
3 0
4 years ago
A ticket for a seat at a school play costs £2.95
Levart [38]

Answer:

Answer vary :

2.95(21 times 39) = $2,416.05

Step-by-step explanation:

honestly in my opinion that the answer. so we’re trying to find out how much money the school will earn.

if each seat cost 2.95 we need to find out how many seats are their?

-21 times 39 = 819

we multiplied the rows and seats find out how many seats their are and the answer is 819.

after you do that now we have to find out how much money they will earn from selling all 819 seats.

-819 times 2.95 = 2,416.05

we then multiplie all of the seats wich is 819 seats by 2.95 wich is the cost of one seat and got 2,416.05, and that’s the answer we’ve been looking for.

and that’s how I got my answer.

6 0
3 years ago
Help please and show the steps
Phantasy [73]

9514 1404 393

Answer:

  4096∠0°

Step-by-step explanation:

The polar form of the base value is 2∠120°. Then the 12-th power is ...

  (2^12)∠(12×120°) = 4096∠0° . . . . or θ = 0 radians, as you wish

_____

I prefer the simpler notation r∠θ, rather than ...

  r(cos(θ) +i·sin(θ))   or   r·cis(θ)   or   r·e^(iθ)

You might not see this notation very often in areas outside of electrical engineering.

7 0
3 years ago
Write the following factors using an exponent.
masha68 [24]
The point of an exponent is to show how many times something is multiplied together.  Since it is multiplied twice, the answer is 100^{2}
3 0
3 years ago
Read 2 more answers
Solve (5b+9)(8-3b)=0
AysviL [449]

Answer:

b = 8/3 or b = -9/5

Step-by-step explanation:

Solve for b over the real numbers:

(5 b + 9) (8 - 3 b) = 0

Split into two equations:

8 - 3 b = 0 or 5 b + 9 = 0

Multiply both sides by -1:

3 b - 8 = 0 or 5 b + 9 = 0

Add 8 to both sides:

3 b = 8 or 5 b + 9 = 0

Divide both sides by 3:

b = 8/3 or 5 b + 9 = 0

Subtract 9 from both sides:

b = 8/3 or 5 b = -9

Divide both sides by 5:

Answer: b = 8/3 or b = -9/5

7 0
3 years ago
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