Richard mccarthy (born 2/14/64; social security number 100-10-9090) and christine mccarthy (born 6/1/1966; social security number 101-21-3434) have a 19-year-old son (born 10/2/99 social security number 555-55-1212), jack who is a full-time student at the university of key west. the mccarthys also have a 12-year-old daughter (social security number 444-23-1212), justine, that lives with them. richard is the ceo at a national paper company. his form w-2 is provided.

Ahospital purchases a $500,000 magnetic resonance imaging (mri) machine that has a useful life of 9 years. the salvage value at the end of 9 years is $77,000. (a) write a linear equation that describes the value y (in dollars) of the mri machine in terms of the time t (in years), 0 ≤ t ≤ 9. (b) find the value, in dollars, of the machine after 6 years. $ (c) find the time, in years, when the value of the equipment will be $140,000. (round your answer to two decimal places.) yr