Question: "in the figure below, both circles have the same center, and the radius of the larger circle is r. if the radius of the smaller circle is 3 units less than r, which of the following represents the area of the shaded region? "
answer is: (pi)r^2-(pi)(r-3)^2
*can someone explain how? i don't even know how to start. ~will draw diagram under~

Find the quotient. 50a2 – 98b2 -5a +7b

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

A. use the formula for continuous compounding with the original example: $1000 invested at 2% for 1 year. record the amount to 5 decimal places. use a calculator. b. compare it to the result using the original compound interest formula with n = 365 calculated to 5 decimal places. which has a larger value? explain.