Pls solve this I need help

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

An angle that measures between 90 and 180° is called a(,

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.