A radioactive substance decays exponentially. a scientist begins with 190 milligrams of a radioactive substance. after 33 hours, 95 mg of the substance remains. how many milligrams will remain after 65 hours?

What solid figure is represented by a can

For a given ratio how many equivalent ratios can be written?

Use a property to write an equivalent expression 6x7

The difference of the squares of two positive consecutive even integers is 20. find the integers. use the fact that, if x represents an even integer, then xplus 2 represents the next consecutive even integer.

Rewrite the fractions with their LCD. (1) / (3x-9y), (6) / (5x-15y) A. 2/8x-21y and 2/8x-21y B. 5 (x-3y) / 15 (x-3y) and 18 (x-3y) / 15 (x-3y) ^2 C. 5/15 (x-3y) and 18/15 (x-3y) D. 5/15x-135y and 18/15x-135y

You bought 0.875 kilogram of mixed nuts. What was the total cost, in dollars, of the mixed nuts that you bought.

13 is 26% of what number

A rectangular area of 36 f t2 is to be fenced off. Three sides will use fencing costing $1 per foot and the remaining side will use fencing costing $3 per foot. Find the dimensions of the rectangle of least cost.

How do you raise $7.50 by 20%

Mike purchased a round wall clock the clocks radius is 10m what is the circumference of the clock