Iodine-131 has a half-life of approximately 8 days. Find the amount ofiodine-131 left from a 100-gramsample after 40 days. Use ALL numbers after the decimal place.

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.