Abe, a plumber, charges $50 per hour plus $75 for making an in-home visit. the plumbing service charges $65 per hour but no set fee for a visit. how many hours of pluming work are needed for each to cost the same?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

If a is a nonzero real number then the reciprocal of a is