Simplify the expression 15x^0

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

David bought a poster for an art project. the poster is 2.7 feet wide and 3.9 feet tall. what is the area of the poster?

This circle is centered at the origin, and the length of its radius is 6. what is the circle's equation? a. x^2+y^2=36 b x^2+y^2=6 c x+y=36 d x^6+y^6=1