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olga_2 [115]
3 years ago
6

a barrel of water contains 60 gallons of water if 21 gallons leaked out what percent of water was left in the barrel

Mathematics
2 answers:
adelina 88 [10]3 years ago
3 0

Answer:

65% remains in the barrel

:)

DiKsa [7]3 years ago
3 0

Answer:

65%

Step-by-step explanation:

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6 0
2 years ago
Our hearts beat approximately 70 times per minute. Express in scientific notation how many times the heart beats over a lifetime
earnstyle [38]

Answer:

2.69 x 10^{9}

Step-by-step explanation:

We are given the heart's speed - 70 bpm

We count the number of minutes in 73 years :

  • 1 year = 365 days
  • 1 day = 24 hours
  • 1 hour = 60 minutes
  • 73 x 365 x 24 x 60 = 38,368,800 minutes

We multiply the heart's bpm with 73 years worth of minutes

38,368,800 x 70 = 2,685,816,000

Write the number in scientific notation = 2.68581 x 10^{9} ≈ 2.69 x 10^{9}

7 0
3 years ago
Maths<br><br>what is 0.000965 to :<br>2 d.p<br>1d.p<br>2s.g.f<br>3s.g.f<br> thanks
umka21 [38]
Decimal places mean we just start counting immediately after the decimal point, so:
2dp: 0.00
1dp: 0.0

Significant figures, we start counting starting at the first non zero number
So we start counting at the 9, therefore:
2sf: 0.00097
3sf: 0.000965
4 0
3 years ago
How can we calculate the perimeter of an irregular shap
Nonamiya [84]
All you need to do to find the perimeter of an irregular shape is to know all the measurements of the shape and add them all together.
4 0
3 years ago
Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms.
sattari [20]
Let A= <span>2 – 11x2 – 8x + 6x2, the standard form of A is 
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</span>
7 0
3 years ago
Read 2 more answers
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