Answer:
90 im not sure tho but hopefully its correct
Answer:
1) 506.85 minutes
2) 17.33 minutes
3) 23.25 hours
Step-by-step explanation:
1) 16 minutes and 21 seconds

16 minutes and 21 seconds=16.35 minutes
Multiply by 31

2) 537 minutes 20 seconds

537 minutes 20 seconds=537.33 minutes
Divide by 31

3) 999 hours 45 minutes

999 hours 45 minutes=999.75 hours

hi
f(x) = -12x²+9x
So
f'(x) = -24x +9
if x = 6 then f'(6) = -24 (6) +9 = -135
Answer:
8
Step-by-step explanation: