Flora made 7 withdrawals of $75 each from her bank account. What was the overall change in her account? + $525
+ $15
- $15
- $525

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?