The scale of a map is 1 cm : 12 km. if two cities are 1.5 cm apart on the map, what is the actual distance between the cities

The easiest way to do this is to multiply 12km by 1.5. That will give you one and half the value of 12, which will represent the actual distance between the two cities.
12 * 1.5 = 18
The two cities are actually 18 kilometers away from each other.

d. Since the finance charge for the 24 month loan is lower, this loan will save more.  

Step-by-step explanation:

Since, The monthly payment formula of a loan,

Where, PV is the principal value of the loan.

r is the interest rate per period

n is the number of period,

For, 36 months loan, monthly payment,

=

=

=

Thus, the total finance charge =

Again,

For, 24 months loan, monthly payment

=

=

=

Thus, the total finance charge for this loan =

Since, 8190.616 > 7752.35

Thus, the finance charge for 24 month loan is less than that of 36 month loan.

⇒ Since, the finance charge for the 24 month loan is lower, this loan will save more.