Agolf ball is hit from the ground, and its height in meters above the ground is modeled by the function: h(t) = -9.8t*squared* + 29.4t, where t represents the time in seconds after the ball is hit. how long is the ball in the air?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.