Katie works as a waitress and records her monthly tips in the table shown below. if katie decided not to work the month of november, how would her five month average compare to her six month average for monthly tips?
june
$133.45
july
$235.31
august
$239.45
september
$258.87
october
$298.45
november
$115.67
a. her monthly average would have decreased by $19.57
b. her monthly average would have increased by $19.57
c. her monthly average would have increased by $2.07
d. her monthly average would have decreased by $2.07

The average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction work force after he graduates in 2012. his friend tells him that average hourly earnings for construction workers will rise by 2% from 2009 to 2012. based on the data below, assuming that the projected hourly earnings are correct, is jason’s friend’s statement accurate? construction industry - average hourly earnings, 2000-2009 a. his friend’s statement is accurate. the average hourly earnings will increase by 2%. b. his friend’s statement is not accurate. the percent increase will be more than 2% c. his friend’s statement is not accurate. the percent increase will be less than 2% d. his friend’s statement is not accurate. the average hourly earnings will decrease

Combine the information in the problem and the chart using the average balance method to solve the problem.

Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4