Mathematics

Caitlyn Campbell

2 June, 13:51

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?

1. It cannot be a fraction or decimal because the depth of the well is a whole number.

2. It must be a positive number since it represents a number of hours.

3. It must be a negative number because the depth is below sea level.

4. It cannot be greater than - 72 because that is the depth of the well.