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Zolol [24]
3 years ago
15

Is 5 the right answer? Please help

Mathematics
2 answers:
Anettt [7]3 years ago
6 0
I think so I’m not pretty sure
ale4655 [162]3 years ago
4 0

Answer: 3

Step-by-step explanation:

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The formula for the circumference, C, of a circle with given radius, r, is C = 2nr.
LekaFEV [45]

Answer:

C. 22

Step-by-step explanation:

C = circumference

n (pi) = 22/7

r = 3 1 /2

Plug in the numbers for each variable.

C = 2x (22/7) x (3 1/2)

Change the mixed number inIto an improper fraction by multiplying 3 x 2 and adding the 1 which gives us 7 over 2 because 2 is our denominator  so, 3 1/2 = 7/2. It also helps to have 1 as the denominator for 2.

C = (2/1) x (22/7) x (7/2)

Lastly, just multiply the numerators across which give us 308 then multiply the denominators across which gives us 14, so then we divide 308 by 14 and get 22.

6 0
3 years ago
A scientist determines that an antibiotic reduces a population of 20,000 bacteria to 5,000 in 24 hours. Find
Bad White [126]

Answer:

5.8%

Step-by-step explanation:

H= 1/r (in P - in A)

H=24

P=2000

A=5000

24= 1/r (in2000 - in5000)

24r = in 2000 - in 5000

r = in 2000 - in 5000

_________________

24 r

= 05 .7762265

= 5.8 %

8 0
3 years ago
Log16 (x squared - 3x + 12) = 1
vovangra [49]
Log_(16)(x^2 - 3x + 12) = 1
x^2 - 3x +12 = 16
x^2 - 3x - 4 = 0
x = [3 ± √(3^2 - 4(1)(-4))]/[2(1)] = [3 ± 5]/2 = 4, -1

3 0
3 years ago
10. A donut shop serves plain and chocolate
alexira [117]

Answer:

75

Step-by-step explanation

5+3=8

120/8=15

15(5)=75

7 0
2 years ago
Sushil was thinking of a number. Sushil subtracts 3.8 from the number and gets an answer of 53.6. Form an equation with
kkurt [141]

Answer:

x = 3.8 + 53.6

Step-by-step explanation:

From the info that they gave you, you can tell that the original number is unknown, so that is x. Since Sushil is subracting 3.8, meaning, to get x, you're going to have to do the opposite which is........addition! So, to get x, you have to add 3.8, and 53.6. I hope I make sense!!

5 0
3 years ago
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