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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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Last summer Myrtle, worked 45 hours and earned $443.70. She wanted to make at least $550 this summer. Using an inequality, find
Ierofanga [76]

Answer:

11 hours

Step-by-step explanation:

Using an inequality, find how many additional hours must she work in order to reach this goal?

From the above question, the term at least means less than or equal to and it is represented by the inequality = ≤

Hence,

Let the number of additional hours = h

Last summer Myrtle, worked 45 hours and earned $443.70.

The amount she earned per hour = $443.70/45

= $9.86

Our inequality equation is written as;

She wanted to make at least $550 this summer.

$9.86 × h ≤ $550

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h = 550/9.86

h = 55.780933063 hours

Approximately the additional hours she has to work =

55.780933063 - 45 hours

= 10 .780933063 hours

Approximately = 11 hours

8 0
3 years ago
How can you tell which function has the greatest constant of variation?
alekssr [168]

The constant of variation in a <span>direct variation </span>is the constant (unchanged) ratio of two <span>variable </span>quantities.

The formula for direct variation is

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where <span>kk</span> is the constant of variation.

Example 1:

If <span>y</span> varies directly as <span>x</span> and <span><span>y=15</span></span> when x=24,

find <span>x</span> when <span><span>y=25</span></span> .

Find the constant of variation.

<span><span><span>k=<span>y/x</span>=<span>15/24</span>=<span>5/</span></span></span></span>8y=5/8x

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25=5/8x

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The constant of variation in an <span>indirect variation </span>is the constant (unchanged) product between two variable quantities.

The formula for indirect variation is

<span><span>xy=k </span></span>(or <span><span>y=<span>k/x</span></span></span> )

where <span>k</span> is the constant of variation .

Example 2:

If it takes <span>4</span> hours at an average speed of <span>90</span> km/h to do a certain journey, how long would it take at <span>120</span> km/h?

Find the constant of variation.

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Answer:

A decimal in the wrong place can change the value of a number COMPLETELY!

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madam [21]

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<h3>How to determine the range of value of x?</h3>

The figure attached to the question is the given parameter

From the figure, we understand that:

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BA = BD

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The measure of the angle ABC is less than the measure of the angle CBD

This is represented as:

∠ABC < ∠CBD

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ABC = x + 2

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Substitute ABC = x + 2 and CBD = 37 in the inequality expression ∠ABC < ∠CBD

So, we have:

x + 2 < 37

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Read more about angles at:

brainly.com/question/24839702

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