Eloise bought 2 boxes of crackers to share with her friends. Her friends ate 12 of the first box and 23 of the second box. How many boxes were left over?
a.1/2 box
b.3/5 box
c.5/6 box
d.1 2/5 boxes

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.