Question

Alex threw a ball into the air. Its height (in feet) above ground after x seconds is given by f(x) = –2(x – 4) + 23. What's the maximum height of the ball above ground? : A) 29 feet B) 23 feet C) 31 feet D) 15.5 feet

Answer 1

F’(x)= -2 =not 0
Hence no turning point no max