please help please

i searched google and no help. i have been stuck for hours.i have to do a packet and i cant under stand it. it says ' sea level 10 degrees = 1 atmosphere and then i have to do tropopause ,stratapause and mesopause and the rest of it says . an atmosphere i...

How many pairs of integers (not necessarily positive) are there such that both a2+6b2 and b2+6a2 are both squares?

Find the number of pairs of coprime integers (n,m) such that 1≤n≤m≤20.

if u had to have a leg removed or an arm basically you would still be awake, pinned down, have no painkiller and you would feel everything

12 i think coz 16 / 4 = 1 4x3 =12

thank youx