Joy recently hired a contractor to do some necessary work. On the final bill, Joy was charged a total of $925. $205 was listed for parts and the rest for labor. If the hourly rate for labor was $60, how many hours of labor was needed to complete the job?

45

step-by-step explanation:

30+15

a. the are of the rectangle is 18.25

b. 18.25 times two is 36.50

rae me : d

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.