Final answer:
To calculate the total money in Delilah's account after 8 years with 4.2% simple interest, we use the formula A = P(1 + rt). Substituting the values, we find that she will have $11,026.28.
Step-by-step explanation:
To calculate the total amount of money Delilah will have in her account after 8 years with simple interest, we can use the formula for simple interest: A = P(1 + rt), where:
P is the principal amount (the initial amount of money)
r is the annual interest rate (in decimal form)
t is the time the money is invested or borrowed for, in years
First, we convert the annual interest rate from a percentage to a decimal by dividing by 100:
r = 4.2% or 0.042 when expressed as a decimal.
Next, we apply the values to the simple interest formula:
A = 8255(1 + (0.042 × 8))
Now let's calculate:
A = 8255(1 + 0.336)
A = 8255 × 1.336
A = 11026.28
Therefore, after 8 years at a 4.2% simple interest rate, Delilah will have $11,026.28 in her account.