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Dima020 [189]
3 years ago
15

Which expression correctly gives the area of a circular piece of metal that has an 8 inch diameter?

Mathematics
1 answer:
lutik1710 [3]3 years ago
6 0
The answer is J because when u add 2 + 2 it equals none of the above
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Find each measurement indicated round your answers to the nearest tenth. Part 1d. NO LINKS OR ANSWERING QUESTIONS YOU DON'T KNOW
valkas [14]

Answer:

see explanation

Step-by-step explanation:

Using the Sine rule in all 3 questions

(1)

\frac{a}{sinA} = \frac{b}{sinB} , substitute values , firstly calculating ∠ B

[ ∠ B = 180° - (78 + 49)° = 180° - 127° = 53° ]

\frac{a}{sin78} = \frac{18}{sin53} ( cross- multiply )

a sin53° = 18 sin78° ( divide both sides by sin53° )

a = \frac{18sin78}{sin53} ≈ 22.0 ( to the nearest tenth )

(3)

\frac{c}{sinC} = \frac{a}{sinA} , substitute values

\frac{35}{sinC} = \frac{45}{sin134} ( cross- multiply )

45 sinC = 35 sin134° ( divide both sides by 35 )

sinC = \frac{35sin134}{45} , then

∠ C = sin^{-1} ( \frac{35sin134}{45} ) ≈ 34.0° ( to the nearest tenth )

(5)

Calculate the measure of ∠ B

∠ B = 180° - (38 + 92)° = 180° - 130° = 50°

\frac{a}{sinA} = \frac{b}{sinB} , substitute values

\frac{BC}{sin38} = \frac{10}{sin50} ( cross- multiply )

BC sin50° = 10 sin38° ( divide both sides by sin50° )

BC = \frac{10sin38}{sin50} ≈ 8.0 ( to the nearest tenth )

3 0
3 years ago
heather has 500 dollars in her savings account she withdraws 20 dollars per week for gas write an eqaution heather can use to se
34kurt
500-20x=220
I think this is right
5 0
4 years ago
Someone please help me answer this!!
suter [353]

Answer:

4 1/10

Step-by-step explanation:

4.1

= 4 + 1/10

= 4 1/10

Hope you understand!

6 0
3 years ago
A cylinder has volume 78 cm. What is the volume of a cone with the same radius and height?
Dimas [21]

Answer:

26 cm³

Step-by-step explanation:

A cone is 1/3 the volume of a cylinder with the same dimensions

78/3= 26

Volume= 26 cm³

5 0
3 years ago
Thank you for the help! I would appreciate it if someone could explain this content to me. I need help on both of them. I wish t
maksim [4K]
I'm not 100% sure if I am right, but for number 9 you would pick two points on , let's just say you pick points (0, 1) and (2, -2). Then you would find those points in the table. So in this case the answer would be D. And I'm not really sure how to explain #10 but you basically work out each problem with the graph to see if it makes sense. For example if you try working out problem F it wouldn't make sense since you start of with 10 dollars and earn 2 each day. But on the graph it shows that you are loosing two. Sorry if I didn't explain it right, if you have more questions let me know!
5 0
3 years ago
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