How many sides has a regular polygon whose interior angles are 120°each

If duty is levied at 25%, find the duty to be added to a bill of N80.

Simplify 2.04 × 3.7 (Leave your answer in 2 decimal place)

A public car dealer marked up the cost of a car at 30% in an attempt to make 20% gross profit. Due to the value of dollar, he now placed 20% discount on the car. What profit or loss will he make?

Rationalize 5 ÷ (2 − √3)