Which expression represents the product of 3 and (5/4n + 1.8)? (show work )
a) 5.55n
b) 9.15n
c) 3.75n + 1.8
d) 3.75n + 5.4.

111

step-by-step explanation:

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.