What is 15x squared + 17x -4 factored completely

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

What’s the volume of the triangular prism?

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units