The johnson family bought 4 plane tickets for $1,254.25 each.

how much did the johnson family spend on plane tickets?

a.
$313.56

b.
$1,254.25

c.
$4,808.50

d.
$5,017.00

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%

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?