Answer:
28.2743338823
Step-by-step explanation:
The circumference of every circle is 3.14, and in order to find the area you must do Pi (3.14) times the radius doubled (
x R2) Hope that helped!
Answer:
$13.97 was the price of the dinner b4 tax and tip
Step-by-step explanation:
18.60 - 11% (1.84) = 16.76
16.76 - 20%(2.79) = 13.97
The answer should be
f=1/5 x^2 + -2/5x
In this problem, you apply principles in trigonometry. Since it is not mentioned, you will not assume that the triangle is a special triangle such as the right triangle. Hence, you cannot use Pythagorean formulas. The only equations you can use is the Law of Sines and Law of Cosines.
For finding side a, you can answer this easily by the Law of Cosines. The equation is
a2=b2 +c2 -2bccosA
a2 = 11^2 + 8^2 -2(11)(8)(cos54)
a2 = 81.55
a = √81.55
a = 9
Then, we use the Law of Sines to find angles B and C. The formula would be
a/sinA = b/sinB = c/sinC
9/sin54° = 11/sinB
B = 80.4°
9/sin54° = 8/sinC
C = 45.6°
The answer would be: a ≈ 9, C ≈ 45.6, B ≈ 80.4
