20 points! find an equation for the nth term of the sequence. -1, -4, -16, -64,

an = 4 • -1^n

Step-by-step explanation:

Substitute in the value of  n  to find the  n th term.

a 2 = 4 ⋅ ( − 1 2 )  One to any power is one.  a 2 = 4 ⋅ ( − 1 ⋅ 1 )

Multiply  − 1  by  1 .

a 2 = 4 ⋅ − 1

Multiply  4  by  − 1 .

a 2 = − 4

answer:

what is your question that you ask

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