When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 24.0 g of carbon was burned in the presence of 81.2 g of oxygen, 17.2 g of oxygen remained unreacted. What mass of carbon dioxide was produced?

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Simplify the expression 10/11(22z) + (a+5) -1

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?