A student created an art piece that was made of a sphere with 10 cones connected to it. Which formula can be used to determine the volume of the entire art piece?

Is the square root of 4 plus the square root of 16 rational?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?