Which expression would be easier to simplify if you used the associative property to change the grouping?

Indicate the formula for the following conditions: p^c(n,r)=

Fiona has to plot a histogram of the given data

Your company will replace the asphalt roofs on all the buildings at the factory complex shown below. the buildings have flat roofs. you charge according to the total roof area. what is this area, in square yards?