Aparticle's position is r(vector) =(ct^2−2dt^3)i^+(2ct^2−dt^3)j^,. where c and d are positive constants. find expressions for times t > 0 when the particle is moving in the x-direction. express your answer in terms of the variables c and d.

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