Solve for x over the real numbers:
x^2 - 4 x = 5
Subtract 5 from both sides:
x^2 - 4 x - 5 = 0
x = (4 ± sqrt((-4)^2 - 4 (-5)))/2 = (4 ± sqrt(16 + 20))/2 = (4 ± sqrt(36))/2:
x = (4 + sqrt(36))/2 or x = (4 - sqrt(36))/2
sqrt(36) = sqrt(4×9) = sqrt(2^2×3^2) = 2×3 = 6:
x = (4 + 6)/2 or x = (4 - 6)/2
(4 + 6)/2 = 10/2 = 5:
x = 5 or x = (4 - 6)/2
(4 - 6)/2 = -2/2 = -1:
Answer: x = 5 or x = -1
The diameter is 8, so the radius is 4 (cut the diameter in half)
r = 4
The height is h = 3
Plug this into the formula below which is the volume of a cylinder
V = pi*r^2*h
V = pi*4^2*3
V = pi*16*3
V = pi*48
V = 48pi <--- this is the exact volume in terms of pi
V = 48*3.14
V = 150.72 <---this is the approximate volume
V = 151 cubic cm is the approximate volume if we round to the nearest whole number
Answer: choice A
The answer is C! Hoped I help! Have a great day! Vyeeeeeu
Answer:
40
Step-by-step explanation:
Answer:
A is the most suitable answer