Answer:
The answer is 1, -1
Step-by-step explanation:
Because I said so.
In order to solve these sort of problems, we can set up 2 equations from the 2 statements.

We can subsitute the value of f, our first equation, into the second equation and solve like this:

Then we put the the son's age, 20, back into one of our equations and solve for the other value.

Thus, the father is 45 years old and the son is 20 years old.
Answer:
180
Step-by-step explanation:
draw it out it is a rectangle with length=15 and width = 12.
Area of a rectangle = LxW
=15x12
=180
Answer:
13,7
Step-by-step explanation:
P = 0.11
1-p = .89
n = 200
mean = n*p = 22
std dev = n*sqrt(p(1-p)/n) = 4.425
find z values for standard normal distribution
Z= (30-22)/4.425 = 1/808
look up table to find P(Z less than 1.808) which is same P(x less than 30)
for 2nd part, you need 2 Z values
Z1 = (25-22) / 4.425 = 0.678
Z2 = (15-22) / 4.425 = -1.58
P(-1.58 less than Z less than 0.678) = P(Z less than .678) - P(Z less than - 1.58)