If the average running speed of an amateur athlete (in miles per hour) after training fort days is given by S(t) = 0.31 lnt+ 11.3, then answer the following. ROUND YOUR FINAL ANSWERS TO 2 DECIMAL PLACES. A) Find the average running speed of amateur athletes that train for 173 days. D miles per hour B) How many days of training would yield an average speed of 13.6 miles per hour? |:| days