Asked by Anonymous

an arch is in the form of a semi ellipse it is 50m wide at the base and has height of 20m how wide is the arch at the height of 10m above the base?
Answered by Anonymous
an astronaut is to be fired into an ellipitical orbit about the earth having a minimum altitude of 800km and a maximum altitude of 5400km find the equation of the curve followed by the astronaut consider the radius of the eathr to be 6400km
Answered by oobleck
For the ellipse, you can see that
a = 50/2 = 25
b = 20
So, put that into standard form, then find 2x when y=10