Answer:
the value of c = 32.13
Explanation:
all you had to do was take one of the options and divide it by 2.1 and you'll know you have to right answer when it equals 15.3 but just remember if you are dividing by a smaller number the numerator has to be a bigger number to be able to equal whatever is on the other side of the equals symbol.
sorry I'm bad at explaining but I hope this helps