Ms. hill travels 2400 miles at a rate of 400 miles per day to visit her grandchildren. how many days will it take to complete the trip.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.