15. Cât la sută reprezintă: a) 15 din 450;
b) 220 din 60;
d) 0,(5) din 0,(3);
e) 1,(2) din 0,(4);

c) 14 din 420;
f) 1,(1) din 6,(6)?

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides

(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.

step-by-step explanation: