So i have to do this test for math class. i struggle a lot so any help would be appreciated.

Solve for x by completing the square. 2x^2-4x+7=0

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Which of these tools or constructions is used to inscribe a hexagon inside a circle?