You flip 3 coins. what is the probability that you get exactly 2 heads?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries