Can somebody help me on question 15?!

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

The graph of y=x3 is transformed as shown in the graph below. which equation represents the transformed function?