Dustin needed 0.80 meter of fabric to make a pillow. The fabric cost $1.50 per meter. How much did Dustin pay for 0.80 meter of the fabric?

Given parameters:

Length of fabric needed to make a pillow = 0.8m

Cost of fabric per meter = $1.5

Unknown:

Cost of the 0.8m fabric  = ?

Solution:

  The cost of the fabric  = cost per meter x length of fabric

   Input the parameters and solve;

       Cost of the fabric  = 0. 8 x 1.5 = $1.2

Dustin will have to $1.2 for the fabric

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.