Andrew is preheating his oven before using it to bake. The initial temperature of the oven is 65° and the temperature will increase at a rate of 10° per minute after being turned on. What is the temperature of the oven 15 minutes after being turned on? What is the temperature of the oven tt minutes after being turned on?

After 15 minutes, the temperature of the oven will have increased by a total of 10° per minute x 15 minutes = <<10*15=150>>150°.

Therefore, the temperature of the oven 15 minutes after being turned on is 65° + 150° = <<65+150=215>>215°.

Generally, the temperature of the oven tt minutes after being turned on is 65° + 10° per minute x tt minutes = 65° + 10°tt.