Akeycode must contain 4 letters and 3 numbers. the letters may be any letter of the alphabet. the numbers should be any number from 0 to 9. how many different keycode combinations are there?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

This is so hard and it’s for a test

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16