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3 years ago

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1. is the number written in scientific notation? if not, explain. 4.8 x 100^7 a) no; it is not written as a number times a power

of 10. b) yes; the number is written in scientific notation. c) no; the first factor is not a number between 1 and 10.

1 answer:

Nonamiya [84]3 years ago

3 0

<span>no; it is not written as a number times a power of 10.</span>

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The formula to count the permutation since the order the matters: nPr = n! / (n - r)!, where n is the total number and r is the total number of chosen.

1) Substitute values into the formula. SMILE has 5 letters, and we choose 5.

5P5 = 5! / (5 - 5)!

5P5 = 5! / 0!

Zero factorial (0!) is always 1.

So, 5P5 = 5! / 1

5! = 5 × 4 × 3 × 2 × 1

5! = 120

Therefore, 5P5 = 120 / 1, which is 120. We can arrange the word SMILE in 120 different ways.

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