$100sq per ft a triangular sign base of 5 ft height of 3.5 ft the sign will cost

Question

A= bh

  = 1/2 (5) (3.5)

  =

Answer 1

We don't really need to use proportions for this one.

 

Find the area of the triangular sign.  Then multiply the result by 100.

 

Area = (3.5)(5) / 2

        = 17.5 / 2

        = 3.5

        = 8.75

 

The area is 8.75 square feet.

 

 

$100 × 8.75 = $875

 

The cost of the sign is $875.

Answer 2

Find the area of the triangular sign: A = 1/2(5)(3.5)= 8.75 sq. ft.

Since the cost is $100 per sq. ft., use proportions to solve:

 

$100/1sq.ft.  =y/8.75 sq. ft.

 

y =  $875

 

The cost for the triangular sign with dimensions, base of 5 ft and height of 3.5 ft is

 

 

 

$875