Paul can install a 300-square-foot hardwood floor in 18 hours. matt can install the same floor in 22 hours. how long would it
take paul and matt to install the floor working together?
o
o
o
o
4 hours
9.9 hours
13.2 hours
30 hours

The time taken by Paul and Matt to install wall when work together 9.9 hours

Step-by-step explanation:

Given as :

The time taken by Paul to install 300 square foot wall = x = 18 hours

The time taken by Matt to install 300 square foot wall = y = 22 hours

Let The time taken by Paul and Matt to install wall when work together = z hours

Now, According to question

= +

Or, = +

Or, =

Or, =

Or, =

Or , z = 9.9 hours

So, The time taken by Paul and Matt to install wall when work together = z  = 9.9 hours

Hence, The time taken by Paul and Matt to install wall when work together 9.9 hours Answer

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)