Someone please help. I have been stuck on this for awhile. Im not the smartest so please explain how to do it too.

84

Step-by-step explanation:

The surface of this figure consist of six faces:

two right triangles with legs = 4 and 3 sm;

one rectangle with sides 5 and 6 sm;

one rectangle with sides 3 and 6 sm;

one rectangle with sides 4 and 6 sm.

The surface area of whole figure is the sum of areas of this faces.

-- triangle area

-- rectangle 5x6 area

-- rect. 3x6 area

-- rect. 4x6 area

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

the monthly balance will be $75,000