math

posted by .

Tina solved for the decimal value 0f
(3/5*18) and got an answer of 5.4. Four of her classmates argued that her answer was not reasonable. Which of the following statements best explain why that value can not =5.4
A. the number 18 is a multiple of 3 , so the answer must be a whole number
B. The number 18 can be rounded to 20 and 3/5 can be rounded to 1, so the value of (3/5*18) must be less than 20*1, or 20
C. the fraction3/5 is greater than 1/2, so the value of (3/5*18) must be greater than 1/2 of 18 or 9
D. The fraction 3/5 is less then 1, so the value of (3/5*18) must be less than (1*18) or 18

I think it is D.
I did 18*3/5=104/5=54/5=10.8
I really wasn't sure if C or D was the better answer since to me they are both correct.
Can you help explain? thanks for your help!!

  • math -

    C is correct. It is more exact than D.

  • math -

    ok thank you for explaining that.

  • math -

    You're welcome.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math, help

    For the following set, which number has the largest absolute value?
  2. Calculus

    For each value of h, evaluate the following function. Round your answer to four decimal places. lim h->0 (4+3)^(3)-64/h A) h=0.01 B) h=0.001 C) h=0.0001 D) h=-0.01 E) h=-0.001 F) h=-0.0001 For A I got 48.9 For B I got 48.99 For …
  3. Calculus

    For each value of h, evaluate the following function. Round your answer to four decimal places. lim h->0 (4+h)^(3)-64/h A) h=0.01 B) h=0.001 C) h=0.0001 D) h=-0.01 E) h=-0.001 F) h=-0.0001 For A I got 48.9 For B I got 48.99 For …
  4. math

    1/2|6y-9| +5 is < or = 2 i solved it and got two fractions but the answer is 0 can anyone explain?
  5. math

    what is the value of c approximatedto 3 decimal places ,, the value of c is 112 and can you explain as how to get the answer
  6. math

    what is the value of c approximatedto 3 decimal places ,, the value of c is 112 and can you explain as how to get the answer
  7. SAT Math

    Can I please get some help on these questions: 1. If , find the value of 2 square root of 17-x = 2x-10, find the value of x/4. 2. If absolute value of 3x+6 < 9, then which of the following is a possible value of x ?
  8. math check

    Complete the following hypothesis test: Ho: ì = 52, Ha: ì < 52, á = 0.01 using the data below. 43 48 44 48 42 60 54 44 50 35 48 58 ii) Find the p-value. (Give your answer correct to four decimal places.) Incorrect: Your answer …
  9. Java

    1. Which of the following expression evaluates to a value of 15?
  10. math

    I'm having a little trouble solving inverse variation. I have four problems - 2 are solved using proportions, 2 are not --- why can they not all be solved using proportions?

More Similar Questions