Answer:
Do C and D (Option 3 + 4)
Make a rectangular box that is 7/8 foot long, and 3/5 foot wide, then you just multiply the two together, I'm not gonna do it all for ya.
Ok so
for a thing that is P amount at first, with a half life of k days
after t days, the amount left is A
the equation is
given
13% of P remained=A
t=400
replace A with 0.13P and t with 400
0.13P=
divide both sides by P
take the ln of both sides
multiply both sides by k
divide oth sides by ln0.13
k=
evaluate
k=135.897 days
the half life is 135.897 days
The equation that would be used in this situation would be 0.35x+42≤70. Which can conclude the most amount of miles to be 80 miles.