Iel travels 400 miles in 8 hours. what is her rate of change or speed? a) 40 miles per hour b) 50 miles per hour c) 55 miles per hour d) 60 miles per hour

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Need on this geometry question. explain how you did it.

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?