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Mathematics, 21.06.2019 16:30
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.
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Mathematics, 21.06.2019 19:00
Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.
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Mathematics, 21.06.2019 22:30
21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?
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