Which expression is equivalent to 15x+50

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

{0,1,2,3,4,5,6,20,21,22,23,24,25} the distribution is considered to be: skewed the right, skewed the left, not skewed?

Enter the amplitude of the function. f(x)=3cosx