Answer:the answer is 520
Step-by-step explanation: you add 25 to tinas account 12 times
then you add 35 to cliffs account 12 times also and they eventually equal 520 ya
h(t) = 80t - 16t²
Ground level is h(0) = 0
We want to solve for t:
h(t)= 0
80t - 16t² = 0
16t(5 - t) = 0
t = 0 or t = 5
Answer: 5 seconds