A man invests an amount, A, into a bank account. After 15 years (in the 16th year) he deposits another $10 000. After 50 years he has (in the 51st year) $251 894.21 in the account. If the amount of money in the account doubles every 15 years, how much was his initial deposit A?

4

step-by-step explanation:

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )

(−$11) ⋅ 12

deductions are negative and there are 12 months in a year