Radium-226 is a radioactive isotope that decays. Using the equation y=ae−0.000385t , find the half life of Radium-226.

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

With this one. will mark brainliest

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units