28:12
equals...
D...
because 28 and 12 are both able to divided by 4, so if you divided them by 4, it is 7 to 3, (REMEMBER ORDER IS IMPORTANT) so the answer is D.
ANSWER: D
Answer:
12/20 and 11/20.
Step-by-step explanation:
The least common denominator between 3/5 and 11/20 is 20.
For the first equation, we multiple the numerator and denominator by 4 and we get 12/20.
The second equation already has a denominator of 11/20 so we can leave it as is.
Parameterize this surface (call it ) by
with and . The limits on should be obvious. We find the upper limit for by solving for where the sphere and cone intersect:
Take the normal vector to to be
(orientation does not matter here)
Then the area of is