Situation: a 22 gram sample of a substance that's used to sterilize surgical instruments has a k value of 0.138. n equals ne^-kt no=initial mass( at time t=0) n= mass at time t k= a positive constant that depends on the substance itself and on the units used to measure time t= time, in days find the substances half-life, in days. round your answer to the nearest tenth

the answer should be  sample is 18 grams with a k-value of 0.125

Step-by-step explanation:

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