(7.40m)^2+100.0m^2

do i square the numbers or is that just for the unit m?

Depends on the context however this appears to be units for area and should be simplified to  107.4m²

Step-by-step explanation:

The answer to this depends on the context. If m represents a variable where an unknown number is then you must square both 7.40 and m in the parenthesis (7.40m)^2. However, from what is written here this is an area expression and the units are meters squared or m². In this case, it does not represent a variable. You should add the areas together since they are the same unit to simplify the expression.

(7.40m)^2+100.0m^2 = 7.4m² + 100m² = 107.4m²

your answer is 228

step-by-step explanation:

add the top and bottom bases together, then divide them by 2, then multiply by the height.