Answer:
V = (1/3)pi(r^2)h (the first one)
The second choice is the answer
Answer:
Part A
71°
Part B
The ladder is been used safely
Step-by-step explanation:
Part A
We solve the above question using Trigonometric function of Cosine
cos x = Adjacent/Hypotenuse
Adjacent = The distance between the house and the bottom of the ladder = 4 feet
Hypotenuse = Length of the ladder = 12 feet
x = Angle
Hence:
cos x = 4/12
cos x = 1/3
x = arc cos (1/3)
x = 70.528779366°
Approximately to the nearest degree
= 71°
Part B
According to the manufacturer, if the angle the ladder forms with the ground, x, is between 70° and 75°, then it meets safety standards. Is this ladder being used safely?
Angle x = 71°
Therefore, the ladder is been used safely
Answer:
cscθ = 
Step-by-step explanation:
cscθ = 
For a unit circle, radius = 1
hence, hypotenuse = 1
opposite = y
cscθ = 
The answer is (-2, 1) Step-by-step explanation