Answer:
20/3
Step-by-step
(base1+base2)/2 * height = area of a trapezoid
64/12=16/3
16/3*2 = 32/3
32/3-4 = 20/3
16/25 is the simplified answer
You would round the seven to an eight because the 8 next to is is closer to 10 and gives it more value than 5. when you're done it would be rounded to 3.68 because you want to find a number rounded to the nearest tenth so you'd use the extra number (8) to make the final product larger than smaller. it would stay a seven if it was lower than 5.
