The height of a cone is two times it’s base diameter. what is the volume of the cone in terms of its base radius r?

How many $20 bills do you need to have to make $280

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.