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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.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?