What is the following product? assume d is greater than or equal to zero.
^3 sqrt d • ^3 sqrt d • ^3 sqrt d
a: d
b: d^3
c: 3(^3 sqrt d)
d: sqrt 3d

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Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?