SOMEONE SMART DO THESE 5 QUESTIONS FOR ME PLEASE. IM GIVING BRAINLIESTI

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

Strawberries cause two hours per pound kate buys 5 pounds he gets 20% off discount on the total cost how much does kate pay for the strawberries

What is the definition of exponential decay?