An equation for the depreciation of a car is given by y=A(1-r)^t, where y= current value of the car, A=original cost, r=rate depreciation, t=time, in years. The value of a car is half what it originally cost. The rate of depreciation is 10%.Approximately how old is the car?

x + 4/7

step-by-step explanation:

use cymath

- "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."

95.03 is the answer. hope this !