What multiplies to 6, but adds to 9

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

The cost of a taxi ride includes an initial charge of $2.00. if a 5km ride cost $6.00 and a 10km ride cost $10.00, determine the cost of a 15km ride.

Find the solution on the interval [0, 2pi)