Help pls I need help

117cm^2

Step-by-step explanation:

Arectangle = L*W

= 54cm^2

Atrapezoid = 1/2 (a+b) (h)

= 1/2 (15+6) (6)

= 1/2 (21) (6)

= 1/2 (126)

= 63cm^2

(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.