3 years ago

Michael

Mathematics

1 answer:

KengaRu [80]3 years ago

4 0

Answer:

I believe the answer should be 90%

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The number of different cars sold in some country rose from 210 in 1997 to 277 in 2007. Find the percent increase. Round to the

Virty [35]

Find percent increase by subtracting the amounts and dividing it by the old amount, then multiply the result by 100 to make it a percent.

Increase= (277-210)/210

67/210

Then it ends up as 0.319047619...

Multiply that by 100 to make it a percent, which is..

31.9047619..

Round it off, and you get..

32%!

4 0

3 years ago

A bird has a mass of 26 g and perches in the middle of a stretched telephone line. (a) Show that the tension in the line can be

Semmy [17]

Answer:

a) is demonstrated below, b) T=1.462N, c) T=14.6N

Step-by-step explanation:

a) Refer to the attached diagram.

Since the bird is standing in the middle of the line and each half is a straight line, Ta=Tb, so we will call the tension T=Ta=Tb and Tay=Tby

By trigonometry Tay=Ta·Sinθ

Since the system is in equilibrium W=Tay+Tby then:

W=2·Tay=2·Ta·Sinθ=2·T·Sinθ

Since W=mg, being m the mass of the bird and g, gravity:

$mg=2TSin\theta$

Isolating T, we demonstrate that

$T=\frac{mg}{2Sin\theta}$

b) Replacing θ=5º, m=0.026kg and g=9.8m/s² in the last equation, we can get the tension in Newtons:

$T=\frac{0.026*9.8}{2Sin5}=1.462N$

c) With θ=0.5º

$T=\frac{0.026*9.8}{2Sin0.5}=14.6N$

7 0

3 years ago

Could someone help? Thanks

galben [10]

K is the midpoint of AB Correct answer

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3 years ago

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Bob and Alice have designed and created a website for their high school. The first week they had 5 visitors to the site; the sec

snow_tiger [21]

Answer:

Step-by-step explanation:

The trend is multiplying by 2. 5x2=10 10x2=20 20x2=40 40x2=80

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3 years ago

The coordinates of G are

Lorico [155]

The coordinates of vertex G are (2,0). I did this.

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3 years ago