We examine the email addresses of 500 people. No two individuals from this group of people have identical email addresses. We conclude that for all people, no two people have identical email addresses...

The Great Pyramid at Giza near Cairo, Egypt stands 137 meters tall. It's base is a square with each side measuring 230 meters wide. What is the slope of the Pyramid?
Slope...

I am interested in learning both. I've already been playing guitar for about 3 months and have gotten pretty good at it. I also have been playing the alto saxophone for 4 years if that makes any difference...

Consider the differential equation dy/dx=y^2(2x+2). Let y=f(x) be the particular solution to the differential equation with initial condition f(0)=-1.
a) Find the limit of (f(x)+1)/sin(x)...