Answer:
Beatrice will accumulate $1230.72 at the end of the year.
Step-by-step explanation:
We can write:

for deposits
The first month would have only the deposit reflected in her balance, then, expanding some steps of the calculation would yield:

A geometric series is given by:

Translating our series to the short form:

plugin in the values for the 12 month gives:

Answer: Option A: 14t + 4s
Step-by-step explanation:
To find the perimeter of a shape, add up all of its side lengths. We know that the length of the rectangle is (s + 2t), and its width measures (s + 5t).
To find the perimeter, multiply the width by 2 and the length by 2 and add those expressions:
P (perimeter) = 2(s + 2t) + 2(s+5t)
P = 2s + 4t + 2s + 10t
P = 4s + 14t or 14t + 4s
Hope this helps.