Write a function rule for this arithmetic sequence: 3, 3.25, 3.5, 3.75, … a. a(n) = 3 + (n – 1)(1.25) b. a(n) = 3 + (n – 1)(0.25) c. a(n) = 1 + (n – 1)(0.25) d. a(n) = 3 + n(0.25)

step-by-step explanation:

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step-by-step explanation:

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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.