The figure below shows a portion of a tile floor from which the shaded polygon will be cut in order to make a repair. Each square tile has sides that measure 1 foot. Every vertex of the shaded polygon is at the intersection of 2 tiles. What is the area, in square feet, of the shaded polygon?

Which of the following correctly factors the expression 25x⁴ - 16y⁸?

Which of the following numbers is an imaginary number?

Phil earned $800 at his summer job and saved all of his earnings. He wants to buy a deluxe drum kit that is regularly priced at $925 but is on sale for off. The drum kit is subject to 5% sales tax after all discounts are applied. If Phil buys the kit on sale and gives the sales clerk his entire summer earnings, how much change should he receive?

What is the largest value of m for which there exists a real value of n such that m² = 196 – n²?