3 years ago

Find the radius of a circle whose circumference is 9pie

Mathematics

2 answers:

Lera25 [3.4K]3 years ago

6 0

Answer:

1.4 (rounded to the nearest tenth)

1.43 (rounded to the nearest hundredths)

1.432 (rounded to the nearest thousandths)

Step-by-step explanation:

C=2 π r

C/2 π = 9/2 * π = (depends what is is rounded to really)

Nookie1986 [14]3 years ago

6 0

Download Socratic it will help you!

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miskamm [114]

Answer:

Step-by-step explanation:

5 0

3 years ago

What is the sum of the geometric sequence −4, 24, −144, ... if there are 8 terms?

Helga [31]

Answer:

The sum of 8 geometric sequence is 959780

Step-by-step explanation:

We are given

this sequence is geometric

-4 , 24 , -144

First term is -4

so, $a_1=-4$

now, we can find common ratio

$r=\frac{24}{-4}=-6$

we can use formula

$S_n=a_1(\frac{1-r^n}{1-r} )$

n=8

now, we can plug values

$S_8=-4(\frac{1-(-6)^{8}}{1+6} )$

now, we can simplify it

and we get

$S_8=959780$

4 0

4 years ago

A secretary can type 56 words per minute. how much time will she need to type a 4200-word report?

tino4ka555 [31]

The answer would be D, because you do 4200÷56=75 minutes. 75 minutes= 1 hour and 15 minutes

7 0

3 years ago

How do I do number three help pleaseeeeeeee

posledela

I got 36. I did 5-2=3, 3•180=540, 540/5=108, 180-108=72, and 72/2= 36

4 0

3 years ago

A new Neighborhood Activity Complex is being built in Safe Harbor. The perimeter of the rectangular playing field is 486 yards.

siniylev [52]

Answer:

the two lengths= 194 each side

teh two widths= 49 on each side

194+194+49+49= 486

Step-by-step explanation:

486= 2l+2w

l=4w-2

486-2w=2l -divide that by 2

243-w=l

243-w=4w-2

245=5w -divide that by 5

49=w

l=4(49)-2

l=194

w=49

6 0

4 years ago