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olchik [2.2K]
3 years ago
8

What is the radius of the circle that has an area of

*pi" alt="81*x*pi" align="absmiddle" class="latex-formula"> degrees
Mathematics
1 answer:
crimeas [40]3 years ago
7 0

Answer:

R=9

Step-by-step explanation:

the formula for area of a circle is pi r squared

where r denotes the radius of the circle

equating the formula for area with the area of the circle provided

p\i r squared = 81 p\i

r squared = 81

r = radical 81

r =9 inches

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You have researched your dream around-the-world vacation and determined that the total cost of the vacation will be $39,000. You
wel

Answer:

41.8 years

Step-by-step explanation:

From

A = P(1+r/n)^{nt}

A= 39000

r = 10.5%

P = $ 485

n=12

t = the unknown

t= [ ln(A) - ln(P) ] / n[ln(1 + r/n)]

t= ln 39000 - ln 485/ 12[ln(1+0.105/12)]

t= 10.57 - 6.18/0.105

t= 41.8 years

5 0
4 years ago
Sam spends 12.5% of his day doing homework. There are 24 total hours in one day. Which proportion could be used to calculate the
otez555 [7]
Homework =  12.5% of 24 hours  = 0.125 x 24  = 3 hours

Sam spent <u>3 hours</u> on homework.

Proportion of the time spent on homework = 3/24 = 1/8

Answer: Same spent 1/8 of his day on homework.
6 0
3 years ago
Read 2 more answers
Please help I don’t understand.... I will give brainliest to first and I will thank you!
Stolb23 [73]
To find the answer we can break the figure into two parts: a rectangle and a semi circle.

The perimeter of the rectangle:

(10+4)×2

=28 ft

The perimeter of the semi circle:

perimeter of a circle: 2×兀×radius

(The radius: 4/2)

We divide the perimeter by two as it is a semi circle,which is half the circumferece perimeter of a circle.

[2(3.14)(4/2)] / 2

=6.28 ft

We can then add up the numbers to find the answer, and remember that 4 cm is overlapped:

28+6.28-4

=30.28ft

Therefore the answer is 30.28ft.

Hope it helps!
5 0
3 years ago
Helpp me answer this question and explain
Ganezh [65]
The answer is A, you can tell because if you multiply 4 by the numbers inside the parentheses you’ll get =12+24..hope that helped :)
4 0
3 years ago
Check whether 7+3x is a factor of 3x^3+7x
BartSMP [9]

Answer:

no

Step-by-step explanation:

refer to picture for solution

3 0
3 years ago
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