Math

what is 0.000750 in scientific notation?
a.75 x 10^-4
b. 7.5 x 10^-3
c.7.5 x 10^-4
d. 7.5 x 10^-5

what is 27/6 written as a decimal?
a 4.2
b 4.3
c 4.4
d 4.5

what is 8.57 x 10^-4 in standard form?
a.85000
b. 0.00857
c. 8570000
d. 0.000857

which of the following is an example of an irrational number?
a. sqaure root of 25
b. -31
c. 1.414213562
d. 1/15

which number is equivalent to 0.45(repeating decimsl)
a. 1/45
b. 5/11
c. 4/5
d. 1/4

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  1. Someone can check your answers.
    Please post them.

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    Ms. Sue
  2. b.
    b.
    a.
    c.
    b
    but i dont think they are right:(

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  3. 1. b. - I don't know
    2. b. - no
    3. a - I don't know
    4. c. - yes
    5. b - yes

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    Ms. Sue
  4. I'm not sure about question 1 but, 2 isn't B it is D.
    You start by simplifying the fraction then dividing the numerator by denominator. ( 27/6 = 9/2. 9 / 2 = 4.5 )
    Question 3 is 0.0008570000000000001 which is answer B not A. Question 4; as far as I know, is correct. A rational number is a number that can be written as a fraction. Rational numbers include terminating and repeating decimals. For example, Pi is not a rational number because it neither repeats and it's not terminating. Pi can't be a fraction. Last question, You also have right.

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  5. You gave it a good shot! Try adding in a little more practice before jumping into your next quiz or text. <3

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  6. The answer to the first question is c
    You welcome

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