Erica bought a new rug that cost r dollars. She used a coupon that applied a 20% discount, with a 10% sales tax. If there is a shipping and handling fee of $50
applied after the discount and sales tax, which of the following expressions
show the total amount of money that Erica paid for the rug?
A. 0.8r+ 50
B. 0.88r+ 50
C. 0.9r+ 50
D. 1.09r+ 50

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

the answer is su.k.my? ? co.kc

the answer is 62.8 cubic units