Answer:
The explicit formula that can be used is
The account's balance at the beginning of year 3 is
Step-by-step explanation:
we know that
The compound interest formula is equal to
where
A is the Final Investment Value
P is the Principal amount of money to be invested
r is the rate of interest in decimal
t is Number of Time Periods
n is the number of times interest is compounded per year
in this problem we have
substitute in the formula above
X + (x + 1) + (x + 2) + (x + 3)
4x + 6
Well there is a lot of trigonometry in this. I will try my best.
Finding: Distance between Wall A and Wall B.
1. Trig and phythagorean properties for left triangle.
30m
2. Trig and Pythagorean properties for right triangle.
40m (approx)
30 + 40 = 70.
Therefore the distance is APPROXIMATELY 70 meters. I haven't learned trig yet so sorry if I am wrong.