An object moves along a line in such a way that is position at time t is given by a. Find the velocity v(t) and acceleration a(t) of the object.
b. When is the object stationary? When is it advancing? Retreating?

I need to know how to do letter b.

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )

i believe it's a.

i'm not sure on this one, most likely correct.

236 cm 16 time 12 = 192

6 times 7 = 42

192+42