Question

rent an apartment that costs $1400 per month during the first year, but the rent is set to go up $70 per year. What would be the monthly rent during the 12th year of living in the apartment?

Answer 1

2170

Explanation:

Write out the first 3 terms:

a 1 = 1400 ← rent in 1st year

a 2 = 1470 ← rent in 2nd year

a 3 = 1540 ← rent in 3rd year

Arithmetic Sequence: d=70

Explicit Formula:

an = a 1+(n−1)d

a 12 = 1400+(12−1)(70)

a 12 = 2170

Answer 2

70 * 12 = 840

1400 + 840 = 2240

$2,240 monthly

Explanation:

Hope it helps! =D