The applicable formula is
I = Prt
where P = the principal value (12109), r is the interest rate (0.045), and t is the time period in years (1/2)
a) Substituting the given values, the interest amount is computed as
I = ($12,109)(.0.45)(1/2)
I = $272.45
b) The amount Sophia will have to pay back is the sum of the principal amount and the interest owed.
$12,109 + 272.45 = $12,381.45
The answer is -8/15 because you need to cancel out the variables first
Starts off with 67 people.
Pier two: 67 + 36
103 - 23 = 80
Pier three: 80 + 18
98 - 29 = 69
There will be 69 people on the boat heading for Pier four
