Expression - (2 tens 1 one) × 10
unit form and standard form

You can run 4 laps in 10 minutes your friend can run 6 laps in 15 minutes. are these rates proportional

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%