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gladu [14]
3 years ago
5

How much of the original air is present after 240 breaths

Mathematics
1 answer:
zhenek [66]3 years ago
8 0
I believe 2mL is still present
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916 round it to the nearest hundreds
dlinn [17]

Answer:

900

Step-by-step explanation:

9<u>1</u>6

1 is less than 5, so it rounds up to 900

8 0
3 years ago
Read 2 more answers
Find the population variance of: 4 6 8 9 9 <br><br> round to the nearest hundredth
soldi70 [24.7K]

Answer:

Step-by-step explanation:

To find the population variance, we first need the mean:

\bar{x}=\frac{4+6+8+9+9}{5}=\frac{36}{5}=7.2 so the mean is 7.2. To find the population variance (which is almost exactly the same as the sample variance except for a small difference in the denominators of the formula) we have to take each number minus the mean, and then square the difference. Add together all these squared numbers and then divide by the number of numbers. Like this:

(4-7.2)^2=10.24\\(6-7.2)^2=1.44\\(8-7.2)^2=.64\\(9-7.2)^2=3.24\\(9-7.2)^2=3.24

Add together those numbers and divide them by 5:

\sigma=\frac{10.24+1.44+.64+3.24+3.24}{5}=\frac{18.8}{5}=3.76

5 0
3 years ago
Find the value of x. The diagram is not drawn to scale. (1 point)
faust18 [17]

I got 45 for this, not sure if it’s right. Hope that helps. :D

7 0
3 years ago
Parallelogram PQRS has diagonals that are perpendicular. Based on that, which statement is most correct?
viva [34]

Answer:

B- Parallelogram PQRS is also a rhombus.

Step-by-step explanation:

Given

Parallelogram PQRS with perpendicular diagonals

Required

Which of the option is true

(a) PQRS can be a rectangle

A rectangle do not have perpendicular diagonals.

Hence, (a) is false

<em>If (a) is false, then (d) is also false</em>

(b) PQRS can a rhombus

The diagonals of a rhombus are not perpendicular.

So (b) <em>is true</em>

<em>No need to check for (c), since only option is true</em>

4 0
3 years ago
Read 2 more answers
Chang is 6 inches taller than nancy. Use n for nancy’s height in inches. Write an expression to represent chang's height. Then e
Irina-Kira [14]

Answer:

Expression Chang:

N+6

If N = 60

Then 60+6=66

Chang is 66 inches

Step-by-step explanation:

3 0
2 years ago
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