Anyone know what 8.5 x 0.2 is?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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.

Find two consexutive odd integers such that the sum of their square is 650