Ahuman body that is performing light work generates about 400 btus of the body heat per hour while active. if an office that is 20 ft x 30ft x 10ft has 8 workers, how many btus per cubic foot do they produce in 3 hours(to the nearest tenth)

a)0.2 btus/ft3
b)0.6
c)1.5
d)2.9

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

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)