Element X is a radioactive isotope such that every 24 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 70 grams, how long
would it be until the mass of the sample reached 61 grams, to the nearest tenth of a
year?

On monday, the temperature was 6 degrees cooler than it had been on sunday, on tuesday the temperature rose 4 degrees from monday. wednesday's temperature was cooler than tuesday's, but not as cool as it was on monday. which answer choice shows a reasonable answer for the difference in temperature on wednesday, as compared to the temperature on sunday? a) -10 degrees b) -7 degrees c) -4 degrees d) -2 degrees