What shape has 4 equal sides. and sometimes has 4 right angles

What's the area of a circle with a circumference of 6.28

A sample of radioactive waste has a half-life of 10 years and an activity level of 2 curies. After how many years will the activity level of this sample be 0.25 curie? a. 10 yearsb. 20 yearsc. 30 yearsd. 40 yearse. 80 years

What is the 5% sales tax and the 6.5 sales tax of 399.79

A number hidden by spilt ink multiplied by 12 equals sixteen thousand, eight hundred and thirty-six. Sixteen thousand, eight hundred and thirty-six divided by a number hidden by spilt ink equals box.

Nine and one-hundred seventy five thousandths in decimal form

A backyard is 1,188 square feet the length is 54 feet what is its width

How do you simplify the expression 2p - 3p?

Simplify the expression (3x^3 y^-2) ^-4

How would you 2 1/4+8/3

Anagrace has $200 to invest for 10 years. If her local bank pays 7% simple interest on an investment but a national bank pays 5% interest compounded annually, which is the better choice?