An HDR treatment has a total treatment time of 282 seconds on July 1st. Assuming the 192Ir source has not been changed, the treatment will take _____ seconds on July 15th. ( A little hint: Treatment times go up at the same rate as the activity decays. So Tt = T0 e + t where Tt is treatment time on day t and T0 is treatment time on day 0, and t is time difference from each treatment.) Group of answer choices 322 302 296 264 247