Find all solutions for x €(0,21 ) for: 2cos²x-3cosx-2=0. a. x= 2pi/3 b. x=pi/3, 5pi/3 c. x=5pi/6, 7pi/6 d. x=2pi/3, 4pi/3​

For what value of x does 4x = (1/8) x + 5?

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.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?