Question

A typical ruby throated hummingbird weights 3 grams, Convert this to milligrams.

Answer 1

The correct answer is: " 3,000 mg " ;

that is; "Three-thousand milligrams."
____

Explanation:
____
Note: The following is an "exact figure" conversion:
1,000 mg = 1 g ; ↔ 1 g = 1,000 mg ;

(i.e. "One-thousand" milligrams = 1 gram" ;

and likewise: "one gram = one-thousand milligrams."].

____
We are given the weight, as a measure of mass;
in units of "grams" (g) ; and we are asked to convert this number into units of "milligrams (mg) ".
____

So: Convert our given: " 3 g " ; into units of "mg" ; as follows:

" Note:
`3g =(3g)/(1)` " ;

And using the method of "dimensional analysis":

"
`(3g)/(1) *(1,000 mg)/(1g)` = [our answer] ? "
____

Note: The units of: "g" ["grams"] in the numerator of the left multiplicand of the expression—along with the units of "g" ["grams"] in the denominator of the second multiplicand in the expression—both cancel out to: " 1 " ;

→ {Since: "g/g" = "g ÷ g" = "1 ".].

Now, we can write the expression:

→ "
`(3)/(1) *(1,000mg)/(1)` ; → "(3)*(1,000 mg)" = " 3,000 mg" ; which is our answer.

The correct answer is: " 3,000 mg " ;

that is; "Three-thousand milligrams."
____
Hope this answer and explanation is helpful to you!
Wishing you well!
____