D) as a smart consumer, you are always on the lookout for sales, coupons, and rebates. while shopping for new clothes, you notice that one particular brand of shirts is on sale for 20% off the original price. you also have a coupon for $10 off a $40 purchase. coupons are applied after the 20% discount is taken. if each shirt originally costs $17.99, how many shirts would you need to buy to be able to use your coupon? show your work

You need to by 3 shirts so that you can use your coupon.

Step-by-step explanation:

Consider the provided information.

One particular brand of shirts is on sale for 20% off the original price. Each shirt originally costs $17.99

Now calculate the price of each shirts after 20% off.

If the off is 20% that means you need to pay 80% of the original cost.

Now the 80% of $17.99 is:

The cost of each shirt after sale is $14.392

Now you also have a coupon for $10 off a $40 purchase.

We wants the total should be more than $40, Multiply the cost of each shirt with 3 gives the cost greater than $40.

Now the total cost is greater than $40 and you can use a coupon for $10

Thus, you need to by 3 shirts so that you can use your coupon.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

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.