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OlgaM077 [116]
3 years ago
12

simplify the expression. write the answer using scientific notation. (9x10^7)(7x10^9) 1.6x10^17 1.6x10^64 6.3x10^64 6.3x10^17

Mathematics
2 answers:
Daniel [21]3 years ago
5 0
The\ scientific\ notation:a\cdot10^n\ where\ 1\leq a \ \textless \  10\ and\ n\in\mathbb{Z}\\----------------------------\\\\(9\cdot10^7)(7\cdot10^9)=(9\cdot7)(10^7\cdot10^9)=63\cdot10^{7+9}\\\\=63\cdot10^{16}=6.3\cdot10^{16+1}=6.3\cdot10^{17}
kvasek [131]3 years ago
4 0

Answer:

6.3\times10^{17}

Step-by-step explanation:

We have to multiply the expression

(9\times10^7)\times(7\times10^9)

We can rewrite this multiplication as

(9\times7(10^7\times10^9)

Now, use the exponent rule, x^a\cdot x^b=a^{a+b}

63\times10^{7+9}\\\\=63\times10^{16}

Finally, write in scientific notation

6.3\times10^{17}

Last option is correct.

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Mon wants to make 5 lbs of the sugar syrup. How much water and how much sugar does he need…
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7 0
2 years ago
Select all the ordered pairs that make this statement true?
Ierofanga [76]

Answer: (24,-9)

(0,9)

(4,6)

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3x + 4y = 36

Using (3,-2) will be:

= 3(3) + 4(-2)

= 9 - 8 = 1

Using (1,7) will be

= 3(1) + 4(7)

= 3 + 28 = 31

Using (0,0) equals to 0

Using (24,-9) will be:

= 3(24) +4( -9)

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Using (0,9) will be:

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Using (4,6) will be:

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= 3(-12) + 4(-18)

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The correct options are (24,-9), (0,9 and (4,6)

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3 years ago
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