Which situation has a unit rate of $7? Trevor spent $49 on 2 theater tickets.

Sally bought a pack of 5 t-shirts for $35.

Brandon bought 7 gallons of gas for $14.

Gina bought nail polish for $5 and a pack of gum for $2.

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.