Math Problem Solver

15. Chapter Problem Engineers of spacecraft take

care to ensure that the crew is safe from the

dangerous cosmic radiation of space. The

protective hull of the ship is constructed of a

special alloy that blocks radiation according

to the equation P 100(0.2)^x

, where P is the

percent of radiation transmitted through a

hull with a thickness of x centimetres.

a) What thickness of the hull walls will ensure

that less than 1% of the radiation will

pass through?

b) By how much would the thickness of the

walls need to be increased in order to reduce

the harmful radiation transmission to 0.1%?