In a block chain each block has a unique hash value which is dependent on the hash value of the previous block in the chain what happens if any transaction data is changed a modified in the earlier exiting’s blocks

Perry is a freshman, he estimates that the cost of tuition, books, room and board, transportation, and other incidentals will be $30000 this year. he expects these costs to rise about $1500 each year while he is in college. if it will take him 5 years to earn his bs, what is the present cost of his degree at an interest rate of 6%? if he earns and extra $10000 annually for 40 years, what is the present worth of his degree.?

You are considering the purchase of one of two machines used in your manufacturing plant. machine 1 has a life of two years, costs $20,000 initially, and then $4,000 per year in maintenance costs. machine 2 costs $25,000 initially, has a life of three years, and requires $3,500 in annual maintenance costs. either machine must be replaced at the end of its life with an equivalent machine. using eac which is the better machine for the firm

Clara client has just been presented with a standard representation agreement by the law firm of yatz & berger. clara's first language is german. although she speaks and reads everyday english quite well, the legal terms in the contract confuse her. yatz & berger should question 90 options: have someone in the firm, if possible, or a translator from outside of the firm, explain the terms of the contract thoroughly until clara has a full and complete understanding of its terms. advise clara to take the contract home and study it before signing it. have a paralegal explain the most important clauses in the contract to clara in smaller, plain english words. advise clara to sign the contract and take her copy home for study.