A total of 250 people were surveyed about whether or not each person carries a cell phone. The results are shown below in the relative frequency table. Which statement is correct?

Allie answered 72% of the questions on her math test correctly. if she answered 18 questions correctly, how many questions were on the test?

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.

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)