Answer: 30
Step-by-step explanation:
Because you can break the pentagonal base into triangles and the formula to find the area of a triangle is 1/2 Bh so 840/14 = 60 divided by 1/2 = 30
Answer:
-20x+13
Step-by-step explanation:
Step-by-step explanation:
Draw the triangle formed by the ray.
The hypotenuse of the triangle is:
c² = a² + b²
c² = (-5)² + (2√7)²
c² = 25 + 28
c = √53
Therefore:
cos β = -5 / √53
Or, as a proper fraction:
cos β = -5√53 / 53
Answer:
2 a^3 b ^3/4 * 3^1/2
2 a^3 b ^3/4 9^ 1/4
Step-by-step explanation:
(144 a^12 b^3) ^ (1/4)
Rewriting
12 ^2 ^1/4 a^12^1/4 b^3^1/4
We know a^b^c = a^ (b*c)
12 ^ 1/2 a^3 b^3/4
(4*3) ^ 1/2 a^3 b^3/4
We know (ab)^c = a^c * b^c
4^1/2 * 3^1/2
2 a^3 b ^3/4 * 3^1/2
Rewriting 3 as 9 ^ 1/4
2 a^3 b ^3/4 9^ 1/4