6*7ft*5ft+6*7ft*6ft+6*5ft*6ft

Answer 1

To calculate the expression, we need to follow the order of operations, which is parentheses, exponents, multiplication/division (from left to right), and addition/subtraction (from left to right).

6 * 7ft * 5ft + 6 * 7ft * 6ft + 6 * 5ft * 6ft

Remember that multiplying units should be treated separately from multiplying numbers.

First, let's calculate the multiplication involving the numbers:

= (6 * 7 * 5) ft^2 + (6 * 7 * 6) ft^2 + (6 * 5 * 6) ft^2
= 210 ft^2 + 252 ft^2 + 180 ft^2

Now, let's calculate the additions separately:

= 210 + 252 + 180
= 642

Therefore, the expression 6 * 7ft * 5ft + 6 * 7ft * 6ft + 6 * 5ft * 6ft equals 642.