how do you solve like wood shopping problems like if they ask they have 4 pieces of wood and they are and certain wide inches , length and thickness etc and they cost a certain amount how would figure something like thats out

See below.

Step-by-step explanation:

It depends on what information is provided in the problem.  The units are the key in deciding how to solve these types of problems.  The cost could be given as: (using metric, but foot or other unit of length may be substituted):

These prices are all conversion factors.  You can convert a measure such as length, volume, mass, etc., to cost by choosing the correct unit for the measure given.  Use the conversion factors in a manner that when some of the units cancel, you are left with the desired unit.

nothjing

step-by-step explanation:

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.