Radius, r = 3
The equation of a sphere entered at the origin in cartesian coordinates is
x^2 + y^2 + z^2 = r^2
That in spherical coordinates is:
x = rcos(theta)*sin(phi)
y= r sin(theta)*sin(phi)
z = rcos(phi)
where you can make u = r cos(phi) to obtain the parametrical equations
x = √[r^2 - u^2] cos(theta)
y = √[r^2 - u^2] sin (theta)
z = u
where theta goes from 0 to 2π and u goes from -r to r.
In our case r = 3, so the parametrical equations are:
Answer:
x = √[9 - u^2] cos(theta)
y = √[9 - u^2] sin (theta)
z = u
Answer: Blake still has to mow 17,424 acres.
There are 43,560 square feet in an acre.
Blake has already mowed 60% of the lawn, leaving him 40% more to mow.
All we have to do is multiply 17,424 by 0.4 to find the number of square feet remaining.
43560 x 0.4 = 17424
The answer is C. 75. Hope this helps.
Answer:
13x
Step-by-step explanation:
Multiply 13 by 1.
Hope this helps
