Which function represents exponential growth? F(x)=3x F(x) to the third power F(x)=x+3 F(x)=3 to the x power

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Jose bought 20 shares of netflix at the close price of $117.98. in a few years, jose sells all of his shares at $128.34. how much money did jose make? a.) $192.50 b.) $207.20 c.) $212.50 d.) $224.60

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?