Which of the following is the area of the special trapezoid if ab = 10, cd = 10, and the height is 8? 40 units2 80 units2 400 units2 800 units2

Step-by-step explanation:

We know that the area of a trapezoid is given by :-

, where a and b are the opposite sides and h is the height of the trapezoid.

Now, the area of the trapezoid is given by:-

Hence, the area of the trapezoid =

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.