how to solve if one gallon of paint covers 100 sq. ft, how many gallons would you need for a square room that is 10ft high

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.