Write an exponential function that passes through the points (1,3) and (2,20)

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22