The number of cell phone users for a particular plan, n, can be modeled by the function. n(t)=140(1+1.08)^t Where t is the time for months. According to the model, the number of cell phone users is growing at a rate of per month Answers:
1.08% 8% 4.8% 80% what is the answer?

17

step-by-step explanation:

51/3=17

thus 17 is your answer.

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81