What is the answer? Please help, I need this done today.

Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Draw a scaled copy of the circle using a scale factor of 2