Julian jogs 222 kilometers east, 444 kilometers north, and then 777 kilometers west.

Step-by-step explanation:

2 east -7 w= 5 west and 4 north

Now apply the pythagorean theorem.

a^2+b^2=c^2

5^2+4^2=c^2

 25+14=c 2

38 = c 2

sqrt (39) =c

c=6.244 Km

i do not know this sorry : (

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)