Answer:
9857÷ (22÷7) = 3136.318ft
Step-by-step explanation:
Pi times diameter = circumference
Circumference divided by pi = diameter
9857÷ (22÷7) = 3136.318ft
Answer:
4y^2 - 9x^2 = -36
Step-by-step explanation:
x = 2 sec t
y = 3 tan t
x^2 = 4 sec^2 t
y^2 = 9 tan^2 t
Now sec^2t = 1 + tan^2 t so we have:
4(1 + tan^2 t) + 9 tan^2 t = x^2 + y^2
4 + 13 tan^2 t = x^2 + y^2
13 tan^2 t = x^2 + y^2/ - 4
tan^2 t = x^2/13 + y^2/13 - 4/13
But , from the second equation tan t = y/3 so tan^2 t = y^2/9, so:
y^2/9 = x^2/13 + y^2/13 - 4/13
LCM of 9 and 13 is 117 so multiply thru by 117:
13y^2 = 9y^2 + 9x^2- 36
4y^2 - 9x^2 = -36
C is the answer to you're question. :)
B.0 because integers cannot be decimals.
If the diameter of the cone is 5, then the radius of it will be half that, or 2.5, thus
