Number 4: find the value of x

Need this asap if anyone can i would be very grateful. if you could show workings that would really

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

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?