Substitute r = 3 into the equation to prove s = 11.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

chiken

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.

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64