36 i need , explain, i might get in trouble

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)