Carbonâ€"14 is a radioactive isotope that decays exponentially at a rate of 0. 0124 percent a year. How many years will it take for carbonâ€"14 to decay to 10 percent of its original amount? The equation for exponential decay is At = A0eâ€"rt. A. 8. 06 years B. 18. 57 years C. 8,064. 52 years D. 18,569. 23 years.

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure. which would most likely occur in the kidney? a)more water would be transferred from the nephron. b)less water would be absorbed into the nephron. c)the amount of water in the bladder would decrease. d)the amount of water in the blood would increase.