Answer:
A
Step-by-step explanation:
A because the mean absolute deviation of an eighth grade class is less than that of a seventh grade class. Also, the class size is larger on average for eighth graders (35>31).
Answer: 127.2
Step-by-step explanation: 1⁄2(a × b) + 3⁄2(b × s) is the formula for triangular pyramids. When you follow this formula for triangular pyramids, you will always get these correct.
5n-4 is 4 less than 5 times a number
Answer:
2144.66
Step-by-step explanation: