Match the term to its description.

match
term
definition

elliptical galaxy
a) forms a perfect sphere or an ellipse and is flattened to some degree

irregular galaxy
b) does not have a distinct regular shape

lens galaxy
c) has a large flattened core

spiral galaxy
d) has a central core from which curved arms spiral outward

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.