Answer:
son2: 5
son1: 10
Step-by-step explanation:
2x (son1) + x (son2) + 35 (mother) + 3 (years)*3 (people) = 59
3x = 15
x = 5
Answer:
11.7916666667
Step-by-step explanation:
Area of a circle = pi*r^2
64*pi = pi * radius^2
64 = radius^2
radius = 8 inches
Therefore the diameter is 16 inches.
Find the mean:
6 + 6 +10 + 8 + 10 +8 = 48
48 / 6 = 8
The mean is 8.
Now for each number, subtract the mean and square the result:
6 -8 = -2, -2^2 = 4
6 – 8 = -2, -2^2 = 4
10 – 8 = 2, 2^2 = 4
8 – 8 = 0, 0^2 = 0
10 – 8 = 2, 2^2 = 4
8 – 8 = 0, 0^2 = 0
Now find the mean of those results:
4 + 4 +4 +0 +4 + 0 = 16
16 / 6 = 2.6666
Now find the square root:
SQRT(2.666) = 1.63
The answer is A.