Doctors can use radioactive chemicals to treat some forms of cancer. The half life of a certain chemical is 5 days. A patient receives a treatment of 12 millicuries of the chemical. (A millicurie is a unit of radioactivity.) How much of the chemical remains in the patient days 10 later? The amount remaining after 10 days is
nothing millicuries.

How many different ways can you make change for $.50 using only nickels, dimes, and quarters?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?