Awall in marcus's bedroom is 8 1/3 feet high and 16 1/5 feet long. if he paints 1/3 of the wall blue, how many square feet will be blue?

45 ft² will be blue

Explanation:
1- getting the area of the wall:
area of the rectangle can be calculated as follows:
area = length * width

we are given that:
length =  ft
width =  ft

Now, substituting in the above rule, we can get the area as follows:
area =  *  = 135 ft²

2- getting the area that would be pained blue:
We are given that  of the area of the room would be painted blue, this means that:

area of blue =  * area of room

area of blue =  * 135

area of room = 45 ft²

Hope this helps :)