Estimate the number of times an average person's heart beats in a lifetime. assume the average heart rate is 69 beats/min and a life span of 75 years.

65,279,520,000   i hope this helps!   :)

Step-by-step explanation:

69 * 60 = 4140   number of minutes in an hour

4140 * 24 = 99,360   number of hours in a day

99,360 * 8,760 = 870,393,600   number of hours in a year

870,393,600 * 75 = 65,279,520,000  number of years

an average of 65,279,520,000 heart beats in 75 years

- 1.613 = -1.6 or -1.61

-1.522 = -1.5 or -1.52

0.587 = 0.6 or 0.59

3.079 = 3.1 or 3.08

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720