Which of the following is equal to 8 1/3?

[LNguyen]

Which of the following is equal to 8 1/3( equavalent to 2 in decimal form)?

A) 7^(3/3) ( which is equal to 7)
B) 7^(4/3) ( which is equal to 13.39)
C) 7^(5/8) (which is equal to 3.37)
D) 8^(3/3) (which is equal to 8)
E) 8^(4/3) ( which is equal to 16)

How are we suppose to trust that answers are right in these quizzes?

[mbaxter1]

Which of the following is equal to 8 1/3( equavalent to 2 in decimal form)?

A) 7^(3/3) ( which is equal to 7)
B) 7^(4/3) ( which is equal to 13.39)
C) 7^(5/8) (which is equal to 3.37)
D) 8^(3/3) (which is equal to 8)
E) 8^(4/3) ( which is equal to 16)

How are we suppose to trust that answers are right in these quizzes?

8 1/3 = 8 + 0.33 = 8.33
7 4/3 = 7 + 1.33 = 8.33

[LNguyen]

8 1/3 = 8 + 0.33 = 8.33
7 4/3 = 7 + 1.33 = 8.33

I understand now. For future references "^" means to the power of, therefore

7(4/3) is not the same as 7^(4/3). That is saying "seven raised to the power of 4/3" which would give you a totally different answer.

[jbozarth]

Which of the following is equal to 8 1/3( equavalent to 2 in decimal form)?

A) 7^(3/3) ( which is equal to 7)
B) 7^(4/3) ( which is equal to 13.39)
C) 7^(5/8) (which is equal to 3.37)
D) 8^(3/3) (which is equal to 8)
E) 8^(4/3) ( which is equal to 16)

How are we suppose to trust that answers are right in these quizzes?

Best way to process fractions is to break it down to a pure fraction form.

So 8 (1/3),

Multiply the whole number by the denominator (8*3=24) then add it to the numerator. (24+1=25).

So 8 1/3 = 25/3

If you repeat the same process for each of the possible solutions, all but one answer has a denominator of 3. If none of the answers with the three denominator equal 25/3 you can determine that the last option has to be correct.