Answer:
7.87 years
Step-by-step explanation:
#First we determine the effective annual rate based on the 9% compounded semi annual;

#We then use this effective rate in the compound interest formula to solve for n. Given that the principal doubles after 2 yrs:

Hence, it takes 7.87 years for the principal amount to double.
The answer is plus +3 for slope
OKay i willl help what are the questions
Step-by-step explanation:
1 l = 22.5 km
125 l = 22.5 × 125 = 2812.5 km
The common difference is a₂-a₁=14-9=5.
The fourth term is the third term plus the common difference -> 19+5=24.
The answer is B.