Which formula can be used to find the nth term of a geometric sequence where the fifth term is 1/16 and the common ratio is 1/4
2 answers:
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Answer:
m∠B = .
Step-by-step explanation:
Since the three sides of the triangle are given, then we apply cosine rule.
=
+
- 2ac Cos B
But, a = 660 cm, b = 680 cm, and c = 100 cm.
So that;
=
+
-2(660 x 100) Cos B
462400 = 435600 + 10000 - 132000 Cos B
462400 = 445600 - 132000 Cos B
132000 Cos B = 445600 - 462400
= -16800
Cos B =
= -0.1273
B = -0.1273
=
Thus, measure of ∠B is .
Answer: 5 s
Step-by-step explanation:
Given
Height of the rocket can be modelled as
Rocket will land on earth when it's height becomes 0
Neglecting 0 value
Thus, rocket remains in air for 5 s.