Discover Questions

I'm in 11th grade and I'm taking on level pre-calculus. I got a B first semester and C third quarter. Can I take AP AB Calculus and get a B? What is the arrangement of Earth, the moon, and the sun during a lunar eclipse? Why can't a quadratic function have a range of negative infinity to infinity? Why is the Earth 6000 years old? Show that 2^(3x) - 1 is divisible by 7?