Quantitative Methods Answers

Certain number of men can finish a work in 10 days. If however there were 10 men less it then it will take 10 days more for work to be finished. How many men were there originally?

Extensive reaserch on the market for the popular "plonker" product had yielded the following results:
Consumer Demand: Market price is inversely proportional to consumer demand. when the market price is 32, consumers are willing to buy 32(000's of units) in any given month.
Supply: Market price os directly proportional the square root of the quantity that the firms are willing to collectively suplply. when the market price is 10, firms are willing to supply 25(000's of units) in any given month.
required:
A.using the information givven above, deduce an equation relating the market price,pd($) and quantity demand qd(000's)
B. complete the following table:
qd: 20 40 60 80 100 120 140 160
pd:
C. hence, plot fully - labelled graph of market price against consumer demand, joining your plotted points with a smooth curve.
D. uding the information above, deduce an equation the market price, ps($) and the quantity supplied, qs(000's)
E. complete the following table:
qs: 20 40 60 80 100 120 140 160
ps:

Hello ,
Do you solve discrete Math ( mathematics for computing )
?? Like proofs containing p and q
?

Do the following sums by hand in IEEE double precision computer arithmetic, using the rounding to nearest rule: a) (1+(2^-51+2^-52+2^-54))-1, b) (1+(2^-51+2^-52+2^-60))-1

I have cryptography homework that I need help with. various problem such as:To prove that a symmetric encryption scheme (KG, E, D) satisfies a security notion, etc.