Have you ever thought about the number of times your heart beats in a life time? consider the average life span of 75 years and the average heart beat of 1.2 heartbeats per second. estimate, using scientific notation, the number of times your heart will beat in your lifetime.

answer: idk

step-by-step explanation:

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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