Martina is very thirsty. She orders a tuna sandwich and 3 bottles of water for lunch. She and Natalie share a bag of chips and each pays half the cost of one bag.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50