Ballistics
Ballistics experts are able to identify the weapon that fired a certain bullet by studying the markings on the bullet. Tests are conducted by firing into a bale of paper. If the distance s, in inches, that the bullet travels into the paper is given by s = 27 - (3 - 10t)3 for 0 ≤ t ≤ 0.3 second, find the velocity of the bullet one-tenth of a second after it hits the paper.