It takes jeremy 6 hours to paint a room. if it takes 4 hours for jeremy and marcus to paint the room together, how long does it take marcus if he paints the room alone?

a) 5 hours
b) 8 hours
c) 10 hours
d) 12 hours
e) 14 hours

12 D. Is the answer

Step-by-step explanation:

The equation we will use is  

1

6

+  

1

x

=  

1

4

. Solve the equation by multiplying each term by the LCM of the denominator, 12x. The equation is now 2x + 12 = 3x. We solve and find x = 12. It will Marcus 12 hours to paint the room alone.

Option C.2268 (pie) ft3

The volume of the cylinder is 2268πft³

Step-by-step explanation:

To calculate the volume of a cylinder we have to use the following formula:

v = volume

h = height = 7ft

π = pi

r = radius = 18ft

v = (π * r²) * h

we replace the unknowns with the values we know

v = π * (18ft)² * 7ft

v = π * 324ft² * 7ft

v = 2268πft³

The volume of the cylinder is 2268πft³