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zhannawk [14.2K]
3 years ago
8

Evaluate WITHOUT a calculator. Answer in scientific notation.(3•10^9) (5•10^6)​

Mathematics
1 answer:
alexandr402 [8]3 years ago
8 0

Answer:

15*10^15

Step-by-step explanation:

5*10^6= 5*1,000,000

5*1,000,000=5,000,000

3*10^9=3*1,000,000,000=3,000,000,000

5,000,000*3,000,000,000=15,000,000,000,000,000

15*10^15=15,000,000,000,000,000

Hope this helps

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The value of a school bus reduces from $512000 to $343000in 3 years. Find the
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Answer:

<em>The uniform rate of depreciation is $56,333 per year, or 11% per year.</em>

Step-by-step explanation:

<u>Rate of Depreciation</u>

If some object has a certain value P and after some time t its value decreases to Q, the rate of depreciation is a measure of how much its value changed per unit time.

It can be calculated as:

\displaystyle R=\frac{P-Q}{t}

It can also be expressed as a percentage, dividing the previous value by P.

The school bus reduces its value from $512,000 to $343,000 in 3 years, thus:

\displaystyle R=\frac{512,000-343,000}{3}

\displaystyle R=\frac{169,000}{3}

R = 56,333 $/year

Expressed as a percentage:

R = 56,333 / 512,000 = 0.11

R = 11%/year

The uniform rate of depreciation is $56,333 per year, or 11% per year.

8 0
3 years ago
Donnell practiced the piano 3 hours longer than Marcus.
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Donnell practiced 7 hours while Marcus practiced 4 hours.
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9. On Johnny math test, he was asked to re-write the expression –3(x + 10) by using the distributive
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Answer:

No, he is incorrect because he forgot to multiple the negative by the x, and only multiplied 3 by x instead of -3 by x.

Step-by-step explanation:

The correct re-write of this expression is:

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I know this one give me like 5 minutes
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Write an equation that could represent the function table​
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Answer:

y = x^{2}

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8 0
2 years ago
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