What is the sum of the multiples of 4 from 40 to 80, inclusive?
Choose the correct choice from the following choices
A) 560
B) 660
C) 800
D) 760
E) 480
The formula we want to use in this type of problem is this:   Average*Total Numbers=Sum   First, find the average by taking the sum of the F + L number and divide it by 2:   A = (F + L)/2   Second, find the total numbers in our range by dividing our F and L numbers by 4 and add 1.   (80/4) - (40/4) + 1   Multiply these together so what we show Average*Total Numbers=Sum   (80 + 40)/2 * (80/4) - (40/4) + 1 = Sum   60 *11= 
<gadget id="calculator">60 *11</gadget>
<output>660</output>
660   660
<result>B</result>
What is the sum of the multiples of 4 from 40 to 80, inclusive?