In water, the greater the depth, the higher the pressure.
for every 10 m increase in depth, water pressure
increases by about 100 kilopascals (kpa). at a depth of
40 m, the pressure is approximately 500 kpa.

write the equation of a linear relation representing the pressure, p, at a depth, d, under water.

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?