Find the least number which must be added to 4220 so as to get a perfect square also find the square root of the perfect square so obtained​

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?