Is 13 a natural number

Which expression is equivalent to 2 (*+7) - 18*+4/5

Two cylinders are similar and the ratio between the lengths of their edges is 2:5, what is the ratio of their volumes?

Which is more, 5.917 or 5.99?

Name the shape in wich all views are a circle

Suppose that $2000 is loaned at a rate of 20%, compounded semiannually. assuming that no payments are made, find the amount owed after 8 years

Kyle needed about 1 liter of water to fill a container. did kyle most likely fill a small glass a spoon or vase?

Tape travels through a tape player at a speed of 9.45 feet per minute. how many feet of tape are needed for half an hour of continuous music?

You invested into a content management company that specializes in peer to peer networks four years ago with a stock value of $56.30 a share. Today, a single share of the company is worth $32.21.

The original price of a new pair of shoes is $40. If there is a 20% discount on all shoes, how much is deducted from the original price?

The sum of 3 consecutive integers is 261. What is the middle number?