What numbers can go in 13?

What is the surface area of a cylinder with a diameter of 34 and a height of 10? How many gallons will fill a 15ft x 15ft x 8ft tank? Determine whether 1.2 10 raise to the power of 5 or 1.3 10 raise to the power of six is closer to one million Explain? How many times can a line and a plane intersect? If you have a basket containing 10 apples you have 10 friends who each want an apple? Thirty-two of this amount makeup a quart? What were ration booklets? How do you find the rule in a linear table of values? What was Albert Einstein's father's name? What two numbers are multiplied to make of 421? How many years are between 1998-2010? A convex ploygon has 7 sides what is the sum of the measures of its interior angles? Why do people think it is OK to commit suicide? What is 5percent of 40? What kind of base does a pentagonal pyramid have? Convert 23 km 51 m to km? What is the equivalent fraction of 24 over 32? What is the horizontal line in an x y coordinate system? What is the equation of the circle whose center is 70 and radius is 7? The prime factorization of 22?