Please help with this 2 problems.

A  is 142 people

Step-by-step explanation:

5 multiplied by 7.1 is 35.5.  You don't need the 7.5 because that isn't the actual height of the building. Then multiply 35.5 by 4 for the length of the building.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)