A man 6 feet tall walks at a rate of 5 ft /sec away from a O light that is 15 feet above the ground. When he is 10 feet ft / sec from the base of the light, at what rate is the length of his shadow changing? -ft / sec O ft / sec O ft / sec A point moves along the x-axis with its position, x, given by O 0 x (1) = 314 - 813 + 5. At which of the following values of t 01 does it change direction? N 0 and 2 Given the equation y = sin 3x, find y". O y'll = 81 sin 3x O y" = -27 cos 3x O y'll = -9 sin 3x O y" = 3 cos 3x 14) Suppose a particle is moving from left to right along the 10 units / second graph of y = x2. Find the rate of change of the distance 4 units / second between the particle and the origin at the instant x = 5 if the 100 units / second particle moves horizontally at a constant rate of 10 units / second. (In other words, dx /dt = 10) 364 units / second What is the greatest amount of sand you could put in a 6.39 cubic feet sandbox made from a 4 foot by 6 foot piece of plywood? O 8.45 cubic feet Remember, the sandbox will be made by cutting equal sized squares from the corners and then "folding" the sides O 12.77 cubic feet upwards 13.16 cubic feet my.thinkwell.com/twtest/printrandom.cim?assessmentID=146486&take=1&isTWExercise=0