45 was divided by a power of ten to get 4.5. what power of ten was it divided by?

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Is a positive integer raised to a negative power always positive

It says factor each expression 49x-28?