Answer:
15 degrees
Step-by-step explanation:
90-75= 15
........
A(1) = 2
r = a(2)/a(1) = -8/2 = -4

Answer will be D.
!! Hope It Helps !!
Answer:
300 liters
Step-by-step explanation:
If he uses 15, 2 liter bottles in a week,
then 15 * 2 = 30 liters in a week.
If he uses the same rate in 10 weeks then,
10 * 30 = 300 liters
The answer is I believe b=70