Demand Supply, Elasticity, Total Revenue

If the Q%/P% equal to 1; therefore it is:

If the price of a a good rises from $4 to $4.50;Total revenue falls from $400 to $350. Is it: 

Good A has 3 substitutes and good B has 20 substitutes; which good is more elastic?

Determine elasticity if the change  in Qunatity (Q) = 2% and the change in Price is 6%.

If the price of a good is $25 and the quantity sold is 15 then total revenue will be:

The total revenue increased for a good is it as the price decreased it is 

If the demand for a good is unit elastic and the price increases then total revenue will:

The relationship between the Q% / P% defines:

If the percentage price of toothpaste increase by 6%; the good would be:

If the demand for a good is inelastic as the price increases then: