100.20 < 7.40t + 41
The chemistry club can spend exactly $100.20 for 8 hours, but cannot exceed 8 hours to keep the maxed limit. So 8 hours or less
C is the answer.........................
x = 5.43 + .83m
5.43 + .83 * 5 = 5.43 + 4.15 = $9.58
Answer:
Option A. 
Step-by-step explanation:
we know that
The combined area of the 3 windowpanes and frame is equal to

using a graphing tool to solve the quadratic equation
The solution is 
see the attached figure
Answer:
B ( 432 units^2)
Step-by-step explanation:
Total surface area= 2*(6*6)+ 4*(15*6)
There are 2 squares at each end of the same size so total area will be 2*(6*6)
If we look at the rectangles( bottom, top and the sides), we can see that all are of same dimensions and there are 4 of them so it's 4*(15*6)
In short, total surface area= 2*(6*6)+ 4*(15*6) = 432 units^2