Which of the following is a quadratic function?

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample