Solve.
-The number of students in a school in year n is estimated by the model $$a _ { n } = 7 n ^ { 2 } + 13 n + 81$$ . About how many students are in the school in each of the first three years?
A) 108, 135, 183
B) 101, 135, 162
C) 101, 135, 183
D) 114, 148, 196

Question

Quizplus · Accepted Answer

For year 1 ($n = 1$): $a_1 = 7(1)^2 + 13(1) + 81 = 7 + 13 + 81 = 101$.For year 2 ($n = 2$): $a_2 = 7(2)^2 + 13(2) + 81 = 28 + 26 + 81 = 135$.For year 3 ($n = 3$): $a_3 = 7(3)^2 + 13(3) + 81 = 63 + 39 + 81 = 183$.

Solve -The Number of Students in a School in Year an=7n2+13n+81a _ { n } = 7 n ^ { 2 } + 13 n + 81an​=7n2+13n+81

Solve
-The Number of Students in a School in Year $a _ { n } = 7 n ^ { 2 } + 13 n + 81$