A company's stock is selling at $35 an share. A month later, it was selling at $14 a share. how much percent was loss

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

How many ordered pairs of positive integers satisfy xy=32?

Solve the formula ax+ by = c for x.