Which is (are) the root(s) of 64x^2 − 324 = 0?

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?