Bob paid $48.6 that’s the total
Equation for density is mass/volume
Mass=22.62 g
Volume= 22/7 x 1/2^2 x 4
3.14 x 0.5 x 0.5 x 4
=3.14 cm3
Mass/ Volume
22.62/3.14
7.2 g/cm3 is the answer
$478 by using the provided formula ...
Explanation : income = $523 , expense = $ 45 , profit =523-45= 478
4.5X+1450=C
X represents the amount of square feet
C represents the total cost