A stunt motorcyclist makes a jump from one ramp 20 feet off the ground to another ramp 20 feet off the ground. The jump
between the ramps can be modeled by y = -640*+ ** +20 where x is the
horizontal distance in feet) and y is the height above the ground (in feet).
2011
a. What is the motorcycle's height r when it lands on the ramp?
b. What is the distance d between the ramps?
c. What is the horizontal distance h the motorcycle has traveled when it
reaches its maximum height?
d. What is the motorcycle's maximum height k above the ground?

594 square inches

step-by-step explanation:

vote !

- "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."

-9

step-by-step explanation:

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer