Juan deposits $800 into an account that pays simple interest at a rate of %5 per year. How much interest will he be paid in the first 3 years

Atypical mre contains 1,200 calories. if the average solider eats 3 mre per day and is deployed for 15 months how many calories will be consumed by a 44 member platoon of soldiers

Precalculus question, image attached.

Mr. vector door is buying two new cowboy hats all together the hats cost $75.12 the second heart cost twice as much as the first hat what is the price of the more expensive at round to the nearest hundredth