EMERGENCY! Please give me the correct answer!

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?