1- B
2- C
3- B
4- D
5- D
6- C
7- B
8- C
9- C
10- C

Hope I helped you!!
I really think that I got them all right.. PLEASE tell me if I got any wrong so that I can change them :) Its been a while since I've done this... XD

3 0

3 years ago

Suppose you received a job offer with a starting salary of $48,500 per year and a guaranteed raise of $1200 per year. Find the n

LuckyWell [14K]

Answer:

7 years

Step-by-step explanation:

This is going to be an arithmetic progression:

48500, 48500 + 1200, 48500 + 1200*2, ...

So the first term is

a₁ = 48500

and the common difference is

d = 1200

Sum of AP is:

S = (a₁ + aₙ)*n/2 = (2a₁ + (n - 1)d)*n/2

Substitute and solve for n:

(2*48500 + (n - 1)*1200)*n/2 = 321000
(97000 + 1200n - 1200)n = 642000
1200n² + 95800n - 642000 = 0
6n² + 479n - 3210 = 0

Solving we get a positive root of:

n ≈ 6.21 and it rounds up to 7 years

3 0

3 years ago