There are 12 cats and 7 dogs at the Humane society. In how many ways can the first customer randomly choose a cat?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.