The quality control manager at a computer manufacturing company believes that the mean life of a computer is 84 months, with a variance of 100. If he is correct, what is the probability that the mean of a sample of 99 computers would be less than 86.8 months? Round your answer to four decimal places.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.