How do you improve 50 meter sprint?

If you spin the spinner two times what is the probability that the spinner will land on the black region twice? What are three equivalent ratios to six to nine? If the area of a square room is 100 square feet what is the length of one side of the room? What are scale models best used to identify? What is a communicative property? What are the 7 continints? All the real square roots of 400? What type of people are suited to be a teacher? What are the 3 consecutive days? Which number is not in the domain of y equals x plus 1 divided by x minus 5? How do you write 5,039,971 in wordform? What is the slope of the line represented by the equation y equals x plus 3 as a fraction? What is history of irrational numbers? Am many 57mm in cm? What is the scale on a map that shows two cities that 400 mil apart as 2.5 in. apart? How do you count the second hand on a clock? In the diagram below what is the approximate length of the minor arc X? What is the coefficients of 12a3 plus 16a plus 4? What is the perpendicular distance from the point 3 -4 on the Cartesian plane to the line 5x -2y equals 3 rounding off work to three decimal places? What are some tools for collecting and analyzing data?