[Solved] The standard form of an equation of an ellipse centered at (h, k) with a horizontal major axis is ________, where \(a > b > 0\) > 0. If the major axis is vertical, then the equation is________ . Machine-Hours: Machine-hours are a measure of the amount of time a machine is operated, used in manufacturing to allocate costs to products. Relevant Range: It refers to the span of activity within which the assumptions about fixed and variable cost behaviors hold true. Contribution Margin: The amount of revenue left after deducting all variable costs associated with producing and selling a product, indicating how much contributes towards covering fixed costs and generating profits. University Store: Not specific enough to provide a definition without context but generally refers to a retail outlet or bookstore operated by or on behalf of a college or university.