Answer:
Tax revenue is the dollar amount of tax collected. For an excise (or, per unit) tax, this is quantity sold multiplied by the value of the per unit tax. Tax revenue is counted as part of total surplus.  Because the tax alters the quantity that is sold in the market, it will result in a deadweight loss.The effect of the tax on the supply-demand equilibrium is to shift the quantity toward a point where the before-tax demand minus the before-tax supply is the amount of the tax. A tax increases the price a buyer pays by less than the tax. A tax causes consumer surplus and producer surplus (profit) to fall.
Explanation:
 
        
             
        
        
        
Volume: 1000 cubic inches (a^3=V -----> 10^3=V ----> V=1000)
42 inches to mm= 1041.4 mm (multiply inch value (42) by 25.4 for mm)
231 cm to mm= 2310 mm (231*10)
5 ft to inches = 5*12 = 60 inches
 
        
             
        
        
        
Answer:
Nitrate in the soil affect photosynthesis the least
 
        
             
        
        
        
According to edgen. it is A
 
        
             
        
        
        
Answer: C.  They will have more time to manage his mother's care.
Explanation:
A single income option means that only one of them will be working and only one source of income will be used to maintain all three of them including Daniel's mother. This will most definitely result in them having less disposable income and less financial income in general. 
Also the scenario painted made no mention of a baby so option D is incorrect. The most likely option in C which makes sense because with one of them staying home to take care of the mother, they will have time to be able to take care of her better.