Use the equation: n! nP (n - r)! Marci wants to keep 3 baby gerbils from a litter of 15 gerbils. How many different ways can she pick those three gerbils?​

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 sin 7x/4 ? i need on this urgent trig

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.