At 2: 15 pm, the temperature of a substance in a science experiment was 7∘f. the temperature was then recorded at 15-minute intervals. at each interval, the new temperature was 3∘f less than the previous temperature. question 1 part a determine whether each expression could be used to find the temperature of the substance at 3: 30 pm. select yes or no for each expression. (−3)(5) yes yes – (−3)(5) no no – (−3)(5) 7+(−3)(−5) yes yes – 7+(−3)(−5) no no – 7+(−3)(−5) 7+(−3)+(−3)+(−3)+(−3)+(−3) yes yes – 7+(−3)+(−3)+(−3)+(−3)+(−3) no no – 7+(−3)+(−3)+(−3)+(−3)+(−3) 7−(3)(5) yes yes – 7−(3)(5) no no – 7−(3)(5) 7+(5)(−3) yes yes – 7+(5)(−3) no no – 7+(5)(−3) question 2 part b what was the temperature of the substance at 3: 30 pm?