Answer:bill 5 m/s. Jack:10 m/s
Explanation:
Cuz I took it
Answer:
hsjdsdddwqdqwdd
Helium
Helium is the least reactive element, since it is a noble gas with the smallest amount of valence rings.
187.92 years
8*10^-2= .08
1.88*10^2= 188
188-.08=187.92
20m/s
it covers 20 metres in a second