A particle’s position along the x-axis is described by the function x(t) = A t + B t2,

where t is in seconds, x is in meters, and the constants A and B are given below.

Randomized Variables
A = -4.9 m/s
B = 6.9 m/s2

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?