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givi [52]
2 years ago
15

Pls can you solve this question from hegartymaths?

Mathematics
1 answer:
Sergeeva-Olga [200]2 years ago
8 0

The area of a circle with radius r is πr². So you need to find r such that

πr² = 56π

⇒   r² = 56

⇒   r = √56 = 2√14

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What is the equation of the slope which is 2 and (1‚8)
sergey [27]

Answer:

y=2x+6

Step-by-step explanation:

Graph the coordinates

Go up to over one or down two left on

Get your y-intercept

put in y=mx+b

6 0
2 years ago
...determina las distintas posibilidades que tiene un agricultor al sembrar 115 arboles en filas de igual numero de arboles ...
Vedmedyk [2.9K]
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5 0
3 years ago
A circle has radius 50 cm. Which of these is closest to its area?
juin [17]

Answer:

7,854cm^2

Step-by-step explanation:

π50²=2500π

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6 0
2 years ago
A random sample of 20 purchases showed the amounts in the table (in $). The mean is $49.57 and the standard deviation is $20.28.
son4ous [18]

Answer:

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.01 = 0.99, so z = 2.325

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.325*\frac{20.28}{\sqrt{20}} = 12.17

The lower end of the interval is the mean subtracted by M. So it is 49.57 - 12.17 = $37.40.

The upper end of the interval is the mean added to M. So it is 49.57 + 12.17 = $61.74.

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

3 0
3 years ago
consider the exponential function f(x)= 1/5(15x) what is the value of the growth factor of the function?
Rus_ich [418]

Answer:

  15

Step-by-step explanation:

The general form of an exponential equation is ...

  f(x) = (initial value)(growth factor)^x

That is, the "growth factor" is the base of the exponent. In your equation ...

  f(x) = (1/5)(15^x)

the growth factor is 15.

3 0
3 years ago
Read 2 more answers
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