PLEASE HELP!! finding square roots of negative numbers

show your work

1-) V-18

2-) 2V-16

The bolo cavern outside of vandalia is 421 ft below sea level. a little more than75 miles away. mt owens is 7295 feet above sea level. what is the difference in elevation between the bolo cavern and mt owens?

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle

Write a problem for the equation 0.5n=12.5. then solve the equation and write the answer to your problem.