Subtraction problems. the composite are playing a concert at the sunshine stadium. at 10: 00a. m 56,000 tickets went on sale. after 20 minutes of ticket sale,18,493 tickets remained. how many were sold in the first 20 minutes?

Solve the triangle. a = 21°, c = 105°, c = 5

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables