Sylvanite is a mineral that contains 28.0% \% gold by mass. how much sylvanite would you need to dig up to obtain 34.0g g of gold?

Since it is said the 1g of mineral contains 28% of gold which is equivalent to .28g of gold. Thus, .28 gram of Gold = 100 grams of Minerals
        => 1g of Gold = 100/28 grams of Minerals
        => 34grams of gold = 100/28 * 34 g of Minerals
        => 34 grams of gold = 952 grams of Minerals
Therefore, it needs 952 grams of Sylvanite minerals in order to have 34 grams of Gold.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.