Solve 4x2 + 25 = -75 using square roots. Select the solution(s).

Explain why phospholipid molecules form a bilayer. (3 marks)

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.