The formula to find the area of a circle is pi x radius^2.
pi = 3.14 (in this case)
radius = 6
6^2 (6 x 6) = 36
36 x 3.14 (radius^2 x pi) = 113.04
So, the area of a circle with radius 6 cm is 113.04 cm.
75 * 1000/3600 = 20.8333333
You just need to multiply with 1000 to get m from km and divide by 3600 because you are converting hours in seconds.
Answer:
-175
Step-by-step explanation:
5x4=20
30x2=60
20-60=-40
-40-135=175
I hope this helps!
Same question and answer as yours!
Answer:
36.36% probability that she gave birth to quadruplets
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcoes.
Desired outcomes:
Giving births to quadruplets.
She has 4 sets of quadruplets.
So 
Total outcomes:
At least 3 children(triplets).
7 sets of triplets and 4 sets of quadruplets.
So 
Probability:

36.36% probability that she gave birth to quadruplets