Abaseball is dropped from a stadium seat that is 73 feet above the ground. its height s in feet after t seconds is given by s(t)=73−16t^2. estimate how long it takes for the baseball to strike the ground.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.