Ineed $100 if i am able to save $8 a week how many weeks will it take to reach $100

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

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

The measure of an angle is 117°. what is the measure of a supplementary angle?