Mr. and mrs. smith retired on 80 percent of their pre-retirement earnings. if they are living on $35,000 per year, what was the total amount of their pre-retirement income?

a) 28,000
b) 43,750
c) 63,000
d) 78,750

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33