Select the interval(s) where the function f(x)=x3+4x2+1 is only increasing. Question 2 options: −2.7 < x< 1.8 0 < x < 4 −∞

Answer for 10 points show work you guys in advanced < 3

Determine the solution for mc001-1.jpeg

Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?