Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level. 7h – 5(3h – 8) = –72 which statement is true about pieter's solution? it cannot be a fraction or decimal because the depth of the well is a whole number. it must be a positive number since it represents a number of hours. it must be a negative number because the depth is below sea level. it cannot be greater than –72 because that is the depth of the well.