An olympian swam the 200-meter freestyle at a speed of 1.8 meters per second. an olympic runner ran the 200-meter dash in 21.3 seconds. how much faster was the runner’s speed than the swimmer’s speed to the nearest tenth of a meter per second?
a 0.1 meters per second
b 0.4 meters per second
c 7.6 meters per second
d 9.4 meters per second

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m