B) prove that PQR is isosceles

Write a corresponding real world problem to represent 2x - 125=400

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.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi