9. Consider the Roadworthy tires from the problem above. What proportion of tires will last between 25,000 and 34,000 miles? 10. The 9-volt batteries from the earlier problem. What proportion of the batteries are expected to last between 1900 and 2060 hours? ,u=16.5 11. The average annual consumption of ice cream per capita is lbs. in the US assuming 324 million as the population. a. Estimate the total consumption of ice cream in the US. b. If the standard deviation is 0225 lbs, what proportion of the US consumes less than 10 lbs. per year