Which shows the dilation with a possible scale factor if 1/2

What is the slope of the line shown below?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2