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3 years ago

A= pi2 and find the area of a circle with radius 5 cm. Use pi = 3.14

Mathematics

1 answer:

lina2011 [118]3 years ago

7 0

Answer:

78.5398163397

Step-by-step explanation:

5x5= 25xpi=78.5398163397

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The graph shows the cost of some taxi journeys work out a formula for c in terms of n

Vitek1552 [10]

Answer:

$c=\frac{3}{5}(n)+2.5$

Step-by-step explanation:

see the attached figure to better understand the problem

Let

c -----> the cost of some taxi journeys

n ----> the number of miles

we know that

The graph is a line

The equation of a line in slope intercept form is

$c=m(n)+b$

where

m is the slope

b is the c-intercept (value of c when the value of n is equal to zero)

Observing the graph we have the points

(0,2.5), (5,5.5)

Find the slope

The formula to calculate the slope between two points is equal to

$m=\frac{c2-c1}{n2-n1}$

substitute the values

$m=\frac{5.5-2.5}{5-0}$

$m=\frac{3}{5}$

we have

$b=2.5$ -----> because the point (0,2.5) is the c-intercept

substitute in the equation of slope-intercept form

$c=\frac{3}{5}(n)+2.5$

4 0

3 years ago

Find the height of the cylinder.

lara31 [8.8K]

$\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h~~
\begin{cases}
r=radius\\
h=height\\
-----\\
V=271.4\\
r=6
\end{cases}\implies 271.4=\pi (6)^2h\implies \cfrac{271.4}{\pi (6)^2}=h$

3 0

3 years ago

Read 2 more answers

What is the area of the trapezoid?

DENIUS [597]

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Answer: 440 ft^2

Explanation:

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

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7 0

2 years ago

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What is the cube root of 27x^18? A)3x^6 B)3x^9 C)9x^6 D)9x^9

Slav-nsk [51]

It’s most likely a :)

7 0

3 years ago

30 POINTS - will mark brainliest!! 4. write the following in exponential form (d only)

Paul [167]

Answer:

ni had this yesterday hold up gotta find answer

8 0

3 years ago