Answer:

Step-by-step explanation:
we know that
To find out the area of the sidewalk, multiply the length by the width of the sidewalk
The width of the sidewalk is equal to

or

The area is equal to

Answer:

Step-by-step explanation:
The magnitude of vector
is given by 
The magnitude of vector
is
.

The magnitude of vector
is
.

Therefore,

Answer: the answer is 5
Step-by-step explanation:
Done this before
Answer:
V = 36 in³
Step-by-step explanation:
The volume of a rectangular prism is given by the formula V = l × w × h
Here our length is
, our width is 4, and our height is 
Plugging in these values to our formula give us 
V = 36 in³