A bookstore manager marks down the price of older hardcover books, which originally sell for b dollars, by 46 percent. A. What is the markdown as a decimal.
B. Write an expression for the sale price of the hardcover book.
C. What is the same price of a hardcover book for which the original retail price was $29.00?
D. If you buy the book in part c, how much do you save by paying the sale price?

A- 0.46

B- (b*0.54) or b - b*0.46

C- 29*0.54= $15.66

D- you are saving $13.34

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45

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.