What is the square root of –16?
A. –8i
B. –4i
C. 4i
D. 8i

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 shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?