Does anyone know what 0.77 as a percentage is?

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price

Hurry efficient homemakers ltd. makes canvas wallets and leather wallets as part of a money-making project. for the canvas wallets, they need two yards of canvas and two yards of leather. for the leather wallets, they need four yards of leather and three yards of canvas. their production unit has purchased 44 yards of leather and 40 yards of canvas. let x be the number of leather wallets and y be the number of canvas wallets. if the profit on a canvas wallet is $25 and the profit on a leather wallet is $40, write a function for the total profit for both wallets.

Find the discriminant of 3x2 - 10x=-2.