y = − 0.005 x 4 + 0.05 x 3 − 0.086 x 2 − 0.04 x + 2.52 y = - 0.005 x 4 + 0.05 x 3 - 0.086 x 2 - 0.04 x + 2.52

554.4

step-by-step explanation:

44*12.6=544.4

goog may have it for you

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

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