Your answer is D you’re welcome!
To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.
Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128
The fourth number is 128
We see that the area is 159 3/8 and the length is 18 3/4.
Because the area is the length*width, to find the width, we must divide the area by the length.
Think of it this way:

Divide l on both sides:

And w is what we're looking for.
So, divide 159 3/8 by 18 3/4.
You should get that the width is 8.5 feet :)
Answer:
27 small cubes
Step-by-step explanation:
Given that,
The volume of the large cube is 
The volume of small cube is 
We need to find how many small cubes make up the large cube. Let there are n small cubes. So, it can be calculated as follows :

So, there are 27 small cubes that make up of the large cube.