1. Senior Trip At a certain school 60 of the 100 boys and 60 of the 80 girls signed up for the senior trip. Is there an
association between going on the trip and gender?
A) We can't tell, because the class doesn't have the same
number of boys and girls.
B) Yes, because the same number of boys and girls
signed up
C) Yes, because a lower percentage of boys signed up
than of girls.
D) No, because the people on the trip were 50% boys and
50% girls.

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.