Barry has 64 butterflies in his collection. he gave half of them to his sister and 12 to his brother. how many butterflies does barry have left in his collection?

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.

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?