So the numbers are increasing by adding 7.
B is the correct answer because you add 7 from 40
a(n) = 40 + 7(n - 1)
for example...
If you want 5th term,
a(5) = 40 + 7(5 - 1)
40 + 28 = 68.
The cos y = 0.3. The cosine of any angle is the same as the sin of the complement of the same angle.
I'm gonna guess the answer is B because you would divide 10x and 216, but that would end up at 21.6.
subtract the 2 to find the difference:
279.48 - 250.55 = 28.93
divide difference by actual amount:
28.93 / 279.48 = 0.1035
rounded to the nearest tenth = 10.4%