Question

1. the first laptop ever sold was the osborne 1. it came onto the market in 1981, and it had a mass of 11 kg. suppose that since 1981 the mass of laptops has decreased at an average rate of 4.7% per year. what was the approximate weight of a laptop in 2019?

1.76 kg
8.10 kg
6.43 kg
4.62 kg

Explanation:

Step1: Calculate time elapsed

$2019 - 1981 = 38$ years

Step2: Define decay formula

$A = P(1 - r)^t$
Where $P=11$, $r=0.047$, $t=38$

Step3: Substitute values

$A = 11(1 - 0.047)^{38}$

Step4: Compute the decay factor

$0.953^{38} \approx 0.160$

Step5: Calculate final weight

$11 \times 0.160 \approx 1.76$

Answer:

1.76 kg