To determine whether or not these are proportional, take the two side lengths that are given and create a ratio. 6cm:3.5cm. I suggest writing this in fraction form to better see the equivalency. If you divide both 6cm and 3.5 cm by 2, you create an equivalent ratio of 3 cm:1.75cm. This is answer A. There is another correct answer too! If you take 6cm:3.5cm and multiple both by 1.5, it will create an equivalent ratio of 9cm:5.25 cm (answer choice E), just in a different order.
One lap is .25 miles. so 9 laps would be 2.25 miles in 2.5 minutes. miles/minute is what we are trying to find. it is exactly what it looks like the amount of miles divided bye he amount of minutes, so 2.25/2.5 ur answer is 0.9 miles/minute
We'll add up the given arc measures and then cut the result in half to get the angle formed by the intersecting chords (that subtend the arcs in question).
