2 years ago

8% of 70 is what number

Mathematics

1 answer:

GarryVolchara [31]2 years ago

3 0

8 percent of 70 is 5.6

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Andrew and Sam start counting from 150 to 200 including. Andrew counts by fives, and Sam counts by threes. What is the ratio of

Agata [3.3K]

Answer:

11/17

Step-by-step explanation:

The question says to find the ratio by which Andrew counts to the ratio Sam counts.

Andrew counts by 5s:

150,155,160,165,170,175,180,185,190,195,200. His total count is 11

Sam counts by 3s:

150,153,156,159,162,165,168,171,174,177,180,183,186,189,192,195,198. His total number of count is 17

The ratio of their count is 11:17

= 11/17

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Step-by-step explanation:

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What is the following product?

Yakvenalex [24]

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the answer is the third one

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The exact value of cos 17pi/8 is . . a) square root of 2+the square root of 2/4 . b.) 0.38. c.) 0.99. d.)square root of 2-the sq

alexgriva [62]

Cos(17pi/8)

cos(17π/8)

But π radians = 180°

17π/8 radians = (17/8) * 180 = 382.5

But this is more than 360°, so we have the basic angle by subtracting 360°

382.5 - 360 = 22.5

cos(17π/8) = Cos22.5

Recall double angle formula for cos.

cos2θ = 2cos²θ - 1

Therefore

cos(2*22.5) = 2cos²(22.5) - 1

cos45 = 2cos²(22.5) - 1

(√2)/2 = 2cos²(22.5) - 1

2cos²(22.5) - 1 = (√2)/2

2cos²(22.5) = (√2)/2 + 1

2cos²(22.5) = (2 + √2) / 2

cos²(22.5) = (2 + √2) / 4

cos22.5 = √( (2 + √2)/4) ................(note)

cos22.5 = √(2 + √2) / 2

Option (a) seems like the closest, comparing to (note) above.

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2 years ago