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Anuta_ua [19.1K]
2 years ago
5

Express them in scientific notationa) 5700. b) 0.00643​

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
3 0

Hello there!

5700 =>5.7x10^{3}

Keep in mind that the coefficient must be between 1 and 10.

The positive exponenet means we move the decimal point to the right.

0.00643 => 6.43x10^{-3}

The negative exponent means we move the decimal point to the left. Hope this helps. PLEASE  mark Brainliest!

~Just a joyful teen

SilentNature

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a line with a slope of -1/9 passes through point (9,-1). What is its equation in slope intercept form
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Answer:

\huge  \orange{y =  -  \frac{1}{9} x} \\

Step-by-step explanation:

To find an equation of a line when given the slope and a point we use the formula

y -  y_1 = m(x -  x_1)

From the question we have

y + 1 =  -  \frac{1}{9} (x - 9) \\ y + 1 =  -  \frac{1}{9} x + 1 \\ y =  -  \frac{1}{9} x + 1 - 1

We have the final answer as

y =  -  \frac{1}{9} x \\

Hope this helps you

4 0
2 years ago
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kirill [66]

Answer:

20 hours

Step-by-step explanation:

We can work easier if we think in terms of an hour

the first equation that we can write is

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the second equation we can write is

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the third equation that we can write is

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now we can substitute the value of B in the first two equations

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C = 1/20 (this means that in an hour C will fill 1/20 of the cistern, so it takes 20 hours to fill the entire cistern)

A = 1/5 - 1/20

A = (4-1)/20 = 3/20

B = 1/20 *2 = 1/10

4 0
3 years ago
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Answer:

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4 0
3 years ago
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