Radium decays exponentially; it has a half-life of 1,600 years. find a formula for the amount, q (t), remaining from 70 mg of pure radium after t years.

What measures of the cylinder do 12 and 42 describe?

There were 18 balls in a bucket. Oliver removed 1/2 of the balls, in a bucket and then removed another 2/3 of those that were left. How many were left?

What is the appropriate null hypothesis? the proportion of smokers among u. s. adults 25 or older who have a bachelor's degree is less than 0.22the proportion of smokers among u. s. adults 25 or older who have a bachelor's degree is equal to 0.

An expansion is a phase in the economic cycle that is characterized by

A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have an average of 82 ? 85 , 90 , 79 , 72

Use divisions to convert the base ten numeral 360 to base six

Emily buys 240 square feet of Carpet. She can convert square feet to square yards by dividing the number of square feet by 9. How many square yards of carpet did emily buy?

9.56 minus 8.88 equals

To find the height of a pole a surveyor moves 140 feet away from the base of the pole and then with a transit 4 feet tall measures the angle of elevation to the top of the pole to be 44° to the nearest foot what is the height of the pole

A x b = 400 a : b = 4 how much is b