Two spheres have volume of 8pi cm^3 and 64pi cm^3. if the surface area of the smaller sphere is 16pi cm^2, what is the surface area of the larger sphere? 64pi cm^2 96pi cm^2 128pi cm^2 256pi cm^2

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?

You have 3.4 gigabytes available on your mp3 player. each song is about 0.004 gigabyte. how many more songs can you download onto your mp3 player?