kendra rides her bike to school each day. it takes her 10 minutes to ride 30 blocks. what unit rate expresses the speed of kendra's bike ride?
2 blocks per minute
3 blocks per minute
4 blocks per minute
10 blocks per minute

Usan threw a softball 42 yards on her first try and 5112 yards on her second try. how much farther did she throw the softball on her second try than her first? express your answer in feet and inches. 9 ft 12 in. 28 ft 12 in. 28 ft 6 in.