28 students travel on a field trip. They bring a van that can seat 12 students. Elena and Kiran’s teacher asks parents to drive cars that seat 3 children each to transport the rest of the students.

Elena wonders if she should use the inequality 12+3n>28 or 12+3n≥28 to figure out how many cars are needed. Kiran doesn’t think it matters in this case. Do you agree with Kiran?

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Which of the following parabolas opens down?