3 years ago

the weight of a rock sample is measured to be 3.1 pounds. What is the percent of error in the measurement?

Mathematics

1 answer:

Arlecino [84]3 years ago

7 0

2% , 5% , 10% are the errors in that

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Work out the area of the triangle.

nignag [31]

Answer:

A = 12.92

Step-by-step explanation:

Base x Height x 1/2

3.4 x 7.6 = 25.84

26.52 x 1/2 = 12.92

Hope this helps :)

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Step-by-step explanation:

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There were 20 boys and 26 girls in a chess club last year. This year the number of boys increased by 30% but the number of girls

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Step-by-step explanation:

Boys

$20 + (20 \div 100)30 = \\ = 20 + 0.2 \times 30 = \\ = 20 + 6 = \\26$

Girls

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Total last year 46

Total this year 48

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5 0

2 years ago

In the right triangle shown, m∠A = 30 degrees, and BC = 6√2, how long is AC?

mart [117]

They're trying to trick you with √2. Remember in the 30/60/90 triangle the sides are in ratio 1:√3:2, with the "1" opposite the 30 degrees.

Here we have

1:√3:2 = 6√2:x:hypotenuse

x/(6√2) = √3/ 1

x = 6√2×√3 = 6√6

Answer: AC=6√6

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3 years ago