Find the xintercepts
f(x) = 2x^4 + x^3 -6x^2 +x + 2

Given that abcd is a rhombus, what is the value of x?

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”?

Why is causation so much more difficult to prove than correlation?