There are 3.9 milligrams of calcium in a 1/2 ounce of cooked chicken. how many milligrams are in 6 ounces

there are 46.80 milligrams in 6 ounces.

Proportionality:

a:b = c:d
ad = bc
where: cross products are equal.

a = 3.9 milligrams
b = 1/2 oz or 0.5 oz
c = ?
d = 6 oz

3.9 : 0.5 = x : 6

 3.9 (6) = 0.5x
23.40 = 0.5x
23.40 /0.5 = 0.5x / 0.5
x = 46.80 

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Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.