There is not enough information given to answer this question. 0.4mg is what percentage of what quantity?
you cannot. you need more info.
Elasticity is defined as the percentage change in quantity for a given percentage change in price. If price goes up by 1% and quantity goes down by 2%, less revenue is generated, since (1.01*P)* (0.98*Q) < P*Q.
It depends on whether you want to find the percentage that 10 dollars represents of some other quantity, or the amount represented by a given percentage of 10 dollars.
With great difficulty - if the given quantity is 2, for example.
A quantity is an amount, or how much there is of a given thing. In this case, a quantity of electricity would be the amount of electricity used in a given reaction.
No, if chocolate is given to teachers they will not decrease the homework.
That depends not on the given concentration percentage (18%) but solely on the quantity (amount) of HCl (or any other) substance!
To decrease the rate of solution of a given solid into a given solvent, cool the liquid.
When quantity supplied exceeds quantity demanded at a given price.
what type and how much quantity of feed should be given to a buffalo for good quantity of milk