Dakota earned money mowing laws this summer. she put 80% of the money in savings she then spends 25% of the remaining money on music downloads. if she has 99$ left to spend on other things, how much money did she earn this summer?

She spent 25% and had $99 left.

$99 is 75% of the remaining money.

Divide to find the total remaining

99 / 0.75 = $132

Now she put 80% of her total earnings in the bank, this means the remaining amount is 20%.

Divide the remaining amount by 20%:

132 / 0.20 = $660

She earned $660 total.

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.

9987

step-by-step explanation: