4) 238 U + 42 He → lon +
5) ton + → 14256 Ba + 9136 Kr + lo n + lo n + lon​

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

the answer is 0.42 is that is an option. this question provides no info