A chemist weighed an object and found its mass to be 250 grams. The objects actual mass is 360 grams. What was the chemists percent of error?

What is the area 17 x 17

Write an expression for "c plus 2."

1222+56660+900+10+100+21

What is the sample space for flipping a coin and rolling a die?

Is x+1 a factor of the polynomial 12x^4+5x^3+3x^2-5? Explain your answer.

How to find number of sides from sum of interior angles?

What is 950,000,000 in scientific notation?

6,8,10,12 arithmetic or geometric

There is a number, which has five digits 5abc9. If this number is the square of an integer, where a, b, c each represent a missing digit and all five digits are different, then find this number.

Andy's backpack weighs 2 1⁄4 pounds. If he removes a book that weighs 13 ounces, how much does the backpack now weigh?