The table shows information about the numbers of hours 30 children spent on their tablets one evening.
a) Find the class interval that contains the median.

What is the standard form of -5x^2+2x^4-11+x^3+3x

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Which of the following expressions is equal to 2x^2+8