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Mathematics 8 Online
OpenStudy (tronedude):

Which is 1024 written as a power of a number? A. 5122 B. 45 C. 54 D. 2564

OpenStudy (mathmale):

You've typed: " B. 45." Is there any chance that you actually meant \[4^5?\]

OpenStudy (mathmale):

|dw:1463713557248:dw|

OpenStudy (tronedude):

A 512^2 B 4^5 C 5^4 D 256^4 Sorry

OpenStudy (mathmale):

Critical difference! Have you tried evaluating any of these four possible answers? Does your calculator do exponentiation? If so, find the value of 512^2, or \[512^2\]

OpenStudy (tronedude):

Yea sorry forgot it did not automatically do it for me

OpenStudy (mathmale):

Please find the square of 9.

OpenStudy (tronedude):

3

OpenStudy (tronedude):

Hello?

OpenStudy (tronedude):

@mathmale

OpenStudy (mathmale):

3 is actually the square root of 9, not the square of 9. "The square of 9" is indicated by 9^2, or\[9^2.\]

OpenStudy (mathmale):

What is it? Use your calculator.

OpenStudy (tronedude):

81

OpenStudy (mathmale):

Much better. What's the square root of 625?

OpenStudy (tronedude):

25

OpenStudy (mathmale):

Now for your Option A: What is 512^2?

OpenStudy (tronedude):

262144?

OpenStudy (mathmale):

Right. Obviously that's not equal to 1024. Discard A as an option. Next: B. What is 4^5?

OpenStudy (tronedude):

1024

OpenStudy (tronedude):

Thanks for your help @mathmale

OpenStudy (mathmale):

Identical to the number in the question. So? Your response?

OpenStudy (mathmale):

My pleasure!

OpenStudy (tronedude):

B is the right answer

OpenStudy (mathmale):

Cool.

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