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Mathematics, 21.06.2019 16:30
The average human heart beats 1.15 \cdot 10^51.15â‹…10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65â‹…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.
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Mathematics, 21.06.2019 17:00
The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?
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Mathematics, 21.06.2019 17:30
For each proportion find the unknown number x 1/5/8=×/15
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