A marble is rolled down a ramp. The distance it travels is described by the formula d = 4902
where d is the distance in centimeters that the marble rolls in t seconds. If the marble is
released at the top of a ramp that is 3,920 cm long, for what time period will the marble be
more than halfway down the ramp?

A) T > 2
B) T > 4
C) T > 8
D) T > 16

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)