A sample of a radioactive isotope had an initial mass of 490 mg in the year 1995 and decays exponentially over time. A
measurement in the year 1998 found that the sample's mass
had decayed to 240 mg. What would be the expected mass of
the sample in the year 2005, to the nearest whole number?

its electric no smoke

step-by-step explanation:

-2 is the right

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

step-by-step explanation: