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aliina [53]
3 years ago
10

What is the tadius of this circle if the circumfrance is 18pi cm​

Mathematics
2 answers:
Sergio039 [100]3 years ago
8 0
The radius is 9. U just need to do the circumference divided by 2
AveGali [126]3 years ago
6 0

Answer:

9

Step-by-step explanation:

The equation of a circle's circumference is 2πr. Divide by pi and 2 to get your answer being 9 for the radius length.

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The birth rate of a population is b(t) = 2300e0.021t people per year and the death rate is d(t)= 1450e0.018t people per year, fi
Cerrena [4.2K]

Answer:

38,674.This area represents the increase in population over a 10-year period.

Step-by-step explanation:

When graphed over the interval 0 ≤ t ≤ 10, the birth rate is more than the death rate. This means the area between the two curves is the amount of births subtract the amount of deaths. This results in an area which means the increase of the population.

The birth rate is graphed in green and the death rate is graphed in blue.

To find the area, take the integral of the difference of the functions:

\int\limits^{10}_0 {2300e^{0.021t} - 1450e^{0.018t} } \, dt \\\\\frac{2300e^{0.021t}}{0.021} -  \frac{1450e^{0.018t}}{0.018} \\\\(\frac{2300e^{0.21}}{0.021} -\frac{1450e^{0.18}}{0.018} ) - (\frac{2300}{0.021}- \frac{1450}{0.018} ) \\\\135117.12 - 96442.51 \\\\38,674

7 0
3 years ago
3x - y = 2<br> 3x - y = 3
expeople1 [14]

Answer:

there is no answer ( I mean this system of equations can't be solved)

Step-by-step explanation:

Because the x eliminates itself there will be no point.

6 0
3 years ago
Use the given minimum and maximum data​ entries, and the number of​ classes, to find the class​ width, the lower class​ limits,
Georgia [21]

Answer:

Step-by-step explanation:

Given that minimum is 8 and maximum equals 82

Range = 84-8 = 76

No of classes =6

Class width = 76/6 ~13

But not given whether variable is discrete or continuous.

If discrete, we have classes as

8-20, 21-33, 34-46, 47-59, 60-72, 73-85

If continuous, we have classes as

8 to <21

21 to <34

and ... ending 73-<86

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3 years ago
The work of a student to find the dimensions of a rectangle of area 6 + 8x and width 2 is shown below:
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Answer:
Step 2; 2(3) = 2(4x)
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4 years ago
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