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3 years ago

To the nearest hundredth, how many cm are in 8 in? (1 in = 2.54 cm)

Mathematics

1 answer:

olga2289 [7]3 years ago

7 0

Answer:

Step-by-step explanation:

all you do is multiply 8 by 2.54, you get 20.32. Your answer is 20.32cm Then round it.

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If the radius of circle A is 6 units, calculate the area of the shaded region...

meriva

The formula of an area of a triangle:

$A_{\triangle}=\dfrac{base\cdot height}{2}$

We have:

$\triangle_{FDE}:\ base=height=1\\\triangle_{GDH}:\ base=height=9$

substitute:

$A_{\triangle_{FDE}}=\dfrac{1\cdot1}{2}=0.5\\\\A_{\triangle_{GDH}}=\dfrac{9\cdot9}{2}=40.5$

The formula of an area of a circle:

$A_O=\pi r^2$

We have $r=6$

Substitute:

$A_O=\pi\cdot6^2=36\pi\approx36\cdot3.14=113.04$

The area of the shaded region

$A=A_O-(A_{\triangle_{FDE}}+A_{\triangle_{GDH}})\\\\A=113.04-(0.5+40.5)=113.04-41=72.04\ u^2$

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3 years ago

Which of the following is the best approximation of the volume of a sphere with a 9 cm radius?

LenaWriter [7]

Volume = 4/3 * PI * r^3
Volume = 4/3 * 3.14159 * 9^3
Volume = 4.18879 * 729
Volume = 3,053.62 cubic centimeters

5 0

3 years ago

What is the percent of change from 4,000 to 600? work too plz

xenn [34]

$\frac { n }{ 100 } \cdot 4,000=600\\ \\ 4,000\cdot n=60,000\\ \\ Therefore:\\ \\ n=\frac { 60,000 }{ 4,000 }$

$\\ \\ =\frac { 60\cdot 1,000 }{ 4\cdot 1,000 } \\ \\ =\frac { 60 }{ 4 } \\ \\ =15$

As 15% of 4,000 is 600, the percentage change was -85%.

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3 years ago

A 90% confidence interval is (35 45). What is the margin of error?

Sergio039 [100]

Answer:

option a 5......

...

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3 years ago

Explain how you can tell, without computing, whether the quotient one -half divided into 6 is greater than one or less than one

Helga [31]

If you take 1/2 of a pizza and divide it up between 6 people, will you have more than 1 whole Pizza or less than 1 whole pizza?

If you divide up a fraction into smaller pieces it will always be less than 1 because it started out less than 1 and you're making it even smaller.

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3 years ago