Find the indicated cardinal number Find n(AxB) given that n(A)=31 and n(B)=9
A. 40
B.279
C.22
D.49

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

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”?