What is the formula that relates circumference and radius?

Mathematics

1 answer:

cestrela7 [59]3 years ago

6 0

B is the correct answer choice I know it

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Find the area of the shaded figure in square feet. Round to the nearest tenth if<br>necessary.

marusya05 [52]

Answer:

to be honest I'm not sure

3 0

3 years ago

8) The height of a building h varies directly as the length and inversely as the width, if h = 25m when l = 10m and w = 5m, find

shtirl [24]

Let h,l, and w represent the height, length, and width of the building respectively

Then

$\begin{gathered} h\text{ = }\frac{kl}{w} \\ \text{where k is the constant of proportionality} \end{gathered}$ $\begin{gathered} \Rightarrow k=\frac{hw}{l} \\ \Rightarrow k=\frac{25\times5}{10}=12.5 \end{gathered}$ $\Rightarrow h=\frac{12.5l}{w}$

The new value of h = 50m, but l remains the same.

That is l = 10m

Therefore

$\begin{gathered} \frac{50}{1}=\frac{12.5\times10}{w} \\ \Rightarrow\frac{50}{1}=\frac{125}{w} \\ \text{Cross multiplying, we have} \\ 50w\text{ = 125} \\ \Rightarrow\text{ w=}\frac{125}{50}=2.5 \end{gathered}$

Hence, the width is 2.5m

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1 year ago

Write a linear equation in standard form that crosses (4, -3) and (-2, 9):

kirill115 [55]

Slope =(9+3)/(-2-4) = 12/-6 = -2
Y+3 = -2 (×-4) => y=-2×+5
D is the line asked
Slope: -1/3
D: y-6 = -1/3 (×-3) or y= -1/3× + 7

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3 years ago

Find the unknown length in the triangle. 15cm and 18cm

vova2212 [387]

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Formula
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a² + b² = c²

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Find the missing leg.
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15² + b² = 18²
b² = 18² - 15²
b² = 99
b = √99
b = 9.95 cm

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Answer: 9.95 cm
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3 years ago

The length of a rectangle is 54cm it's breadth is 8cm what is it's perimeter ? what is it's area?

il63 [147K]

Answer:

$perimeter = 2(length + breadth) \\ =2 (54 + 8) \\ = 124 \: cm$

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3 years ago