4.
49 cents in total. 49/100 as a fraction. 0.49 as a decimal.
5.
85 cents in total. 85/100 or 17/20 as a fraction. 0.85 as a decimal.
6. If it's 7 nickels and 2 pennies then ...
37 cents in total. 37/100 as a fraction. 0.37 as a decimal.
Hope I didn't mess up for your sake