Suppose in exercise 7.1, the test for starch and for reducing sugars was positive after 1-hour incubation, but after the tubes incubated for 2-hours the test for starch was negative. how could you explain these results?

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)