Answer:
Please, see attached picture
Step-by-step explanation:
We can easily solve this question by using a graphing calculator or any plotting tool.
The equation is
f(x) = (1/4)*(4)^(x)
Which is an exponential function, that grows rapidly to infinity as x increases.
Factor −2401
−2401
=(+49)(x+7)(x−7)
d
Using the Cosine rule to find ∠ A
cosA =
=
= , then
∠ A = ( ) ≈ 84.9° ( to 1 dec. place )