Erika's parents gave her $500 for her high school graduation she put the money into a savings account that earns 7.5% annual interest she left the money in the account for 9 months before she withdrew it. how much interest did the account earn if it interests what is paid monthly

Step-by-step explanation:

The interest (simple interest) is calculated by:

Where:

is the principal

is the percent of the principal that is paid over a period of time (yearly in this case).

is the time, since we are told the money was left in the account for 9 months of the 12 months a year has.

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: