Write an equation of the line passing theough the point (4,-1) and perpendicular to the line y=2x-5.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

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”?