So basically it takes 10 people to paint a whole building. Forget about the 5 days. That's just there to confuse you. You have to first find out how much of a building can one person paint so, 1/10. So that means that 7 people can paint 7/10 of a building in 5 days
Answer:
12,500-11,625=875
875/12,500=7/100
7/100*100=7
The percentage reduction is 7%
P.S * represents multiplication
NormalCdf(-2,2,0,1)=.9545
95.45%
Then, it would be 156 + 156*6.5 /100 = 156+10.14 = $166.14
48 all you had to do was out it in a calculator that's what I did
