An entrepreneur buys some fountains. Each one costs $140 and resells online for $357. What is the mark-up, as a percentage

Which quadratic function best fits this data? x y 1 32 2 78 3 178 4 326 5 390 6 337 a. y=11.41x2+154.42x−143.9 b. y=−11.41x2+154.42x−143.9 c. y=11.41x2+154.42x+143.9 d. y=−11.41x2+154.42x+143.9

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?