Find the positive value of x that makes the following equation a true number sentence. x^{2}=81^{-1}

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.

Find the multiplicative inverse of 8-12i

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?