Cressida decided to save a part of her income in a savings account that compounds interest every four months. her account balance after t years can be given by the following expression.

3,545(1.045)3t

what does the value 3 in the exponent represent?

a.
the amount saved each year
b.
the number of times the account compounds interest
c.
the growth factor that reveals the rate at which the account balance increases
d.
the initial amount invested

B. the number of times (per year) the account compounds interest

Step-by-step explanation:

The given expression has no exponent. We assume you intend ...

balance = 3,545·1.045^(3t)

This expression for the account balance suggests Cressida invested 3,545 into an account paying interest at an annual rate of 13.5%, compounded 3 times per year. The 3 multiplying the number of years is the number of times interest is compounded per year.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m