A-6 pack of undershirts cost $13.98.this is $3.96 less than the cost of buying 6 individual shirts. if each undershirt costs the same amount, how much does each undershirt cost when purchased individually

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project