The formula for figuring a student's average test score a is a=p/t, where p is the total points earned on all the tests, and t is the number of tests. find a student's average when 395 points are earned on 5 tests.

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

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.

Which of the following parabolas opens up?