If you determined that the "k" value of your newly purchased tires is 1.0471264 and your speedometer indicates that you are traveling 60 mph, how fast are you really driving? 73 mph 72 mph 62.83 mph 83.62 mph

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point