If yesenia wants to buy a $165,000 whole life policy and the annual premium rate for her age group is $15.46 how much is in your monthly premium

Suppose a pendulum is l meters long. the time, t,in seconds that it tales to swing back and forth once is given by t=2.01

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%

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"