A school bus has 25 seats, with 5 rows of 5 seats. 15 students from the first grade and 5 students from the second tread travel in the bus. How many ways can the students be seated if all the first grade students occupy the first 3 rows? A. 25P20
B. 5P5*20P15
C. 15C15*10C5
D. 15P15*10P5
E. 15P15*10C5

answer: i'm great at algebra

~coco

step-by-step explanation:

asdsaddsa

step-by-step explanation:

there are infinitely many solutions.

(a) {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …}

(b) $59 398

step-by-step explanation:

(a) the annual sequence of profits

aₙ = a₁rⁿ⁻¹

the model for the sequence of profits is {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …} .

(b) profit after 15 yr

  a₁ = $ 30 000

  r = 1.05

a₁₅ = 30 000 × 1.05¹⁴

a₁₅ = 30 000 × 1.979 93

a₁₅ = $59 398

the profit in year 15 will be $59 398.