240 inches will be the correct answer.
Conjectures are conclusions formed from evidences. Steven's conjecture that:
is true because:
or
for 
Given that:

Split the inequality as follows:
or 
Take the cube of both sides
or 
Evaluate all exponents
or 
Steven's conjecture that:
is true because:
or
for 
Read more about absolute inequalities at:
brainly.com/question/4688732
Hector = 2s or h/2
Sister = s
Equation: h/2 = s
Substitution: (20)/2 = s
10 = s
Hector’s sister found 10 seashells.
ANSWER:
3 jjjjjjjjjjjjjjjlkkn buy4fref7g8f7f3g87egf87ewdc7cc wc68efce ewtedg67cccf6cw6f6cfefecec c e6ve6 ev fve
You can see that the price of the first pack is less than twice the price of the second whereas you get lot more than twice much more pencils for it (30>24) so the first deal is clearly way better.