Evaluate the following expressions for a = -3,b= 2, c = 5
and d= -4.
2a + 3b
do not show your work and give a numeric answer only. give
your answer to the nearest hundredth (example: 1.25)

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

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.