The chart below shows four friends' target heart rate zones. during their last spin class, each person averaged 172 beats per minute. based on this information, who worked at the highest intensity level? name target heart rate zone jeff 135bpm—175bpm mike 145bpm—188bpm ty 140bpm—180bpm liam 140bpm—183bpm

Asoccer mom is driving her 75 year old grandmother and her 9 year old daughter home after the game. the grandmother and daughter were both in the back seat and both were wearing their seat belts. a car ran a red light in front of them, causing them to t-bone that car on the passenger side. fortunately there were no serious injuries, but the grandmother did sustain several rib fractures. the mother, daughter and driver of the at-fault car were shaken up but unhurt. what are some possible reasons that the grandmother sustained rib fractures while the other victims did not?