Astring of decorative lights is 28 feet long. the first light on the string is 16 inches from the plug. if the lights on the string are placed 4 inches apart, how many lights are there on the string?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

What’s -11-33k and factor each expression completely

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?