7/8+1/4= add write each sum in simplest form?

How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places.

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000

Ithink i know it but i want to be sure so can you me out ?