Question

Escolha uma:
a. 56
b. 94
c. 64
d. 75
e. 45

Answer 1

$n(t)=\frac{1480}{1+1.2^{40-t}}$

$1400=\frac{1480}{1+1.2^{40-t}}$

$1+1.2^{40-t}=\frac{1480}{1400}$

$1.2^{40-t}=\frac{1480}{1400}-1$

$1.2^{40-t}=\frac{80}{1400}$

$1.2^{40-t}=\frac{2}{35}$

$ln(1.2)^{40-t}=ln\left(\frac{2}{35}\right)$

$(40-t)*0.182=-2.862$

$40-t=-\frac{2.862}{1.2}$

$\boxed{\boxed{t\approx55.7~anos=56~anos}}$

Answer 2

Resposta:

56

Explicação passo a passo:

AVA