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Pani-rosa [81]
3 years ago
10

Help I'm justing learning about this and I don't know what to start or do​

Mathematics
1 answer:
neonofarm [45]3 years ago
7 0
It’s C!! don’t listen to the first answer. all you have to do it count how many zero’s there are
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Circumference (rounding)
LUCKY_DIMON [66]

Answer:

19.5

Step-by-step explanation:

Circumference is radius multiplied by 2, then multiplied by pi.

3.1 × 2= 6.2

6.2 × π= 19.477 ≈ 19.5

π also equals 3.14

4 0
3 years ago
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HELP HELP HELP Sally can paint a room in 4 hours. Joe can paint a room in 6 hours. How
Dmitry [639]

Answer:

2 hrs, 24 min

Step-by-step explanation:

Sally:  in one hour, she can paint 1/4 of the room.

Joe: in one our, he can paint 1/6 of the room

Hour one: 1/4+1/6=3/12+2/12=5/12

1÷5/12=1*12/5=12/5

12/5= 2 & 2/5 hours, or 2.4 hours, or 2 hrs 24 minutes

6 0
3 years ago
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4.6 x 10 to the 6 power minus 8.3 x 10 to the 5th power
snow_tiger [21]
The answer is 3,770,000
4 0
3 years ago
(2a-4a2+8)+(5a2 -5a+6)
lana [24]
A^2-3a+14 is the answer :)
8 0
2 years ago
Read 2 more answers
The area of a square is 81 centimeters find the length of the length find the diagonal
EleoNora [17]

Length = √area  = √81 = 9

diagonal = √2 * side = √2*9 = 9√2

5 0
3 years ago
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