Joann increased her sales by $15,000
from the previous year. If her sales
this year were $85,600, approximately
what was her percent increase?
a. 17%
b.18%
c.21%
d.23%

Three coins are flipped. what is the probability that there will be at least two tails?

Witch represents the inverse of the function f(x)=1/4x-12

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?