Admission to the the zoo is $15 and each individual ticket costs $3.50. What of the following describes the variable used in the scenario?

All per-unit concepts rely on ratios, meaning, to provide a type of measurement

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota