Answer:
Trevor has 30 more cents than Jeff.
Explanation:
Jeff:
1 dime = 10 cents.
So we do 10x7=70.
So Jeff has 70 cents.
Trevor:
1 nickel = 5 cents
So we do 20x5 = 100 cents which is the same thing as 1 dollar.
Then we do 100 cents - 70 cents which is 30 cents.