The amount of Carbon-14 in a wooden spoon found at an archeological site is 2.1 grams. Spoons of this type are known to contain 10 grams of Carbon-14 at their time of creation, and the amount of Carbon-14 x years after the creation of this artifact is modeled by C(x) = 10 times (0.5)t the power of n over 5730. How many years ago was this spoon made? A 27,285.1 years B 12,901.4 years C 2,641.5 years D 6,133.3 years

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?