Final answer:
To find the weight of Emma's backpack, which is 2/3 the weight of Jacob's 8 kg backpack, multiply 8 kg by 2/3 to get approximately 5.3 kg. This value is the most accurate estimate from the given options.
Step-by-step explanation:
The question asks for an estimate of the weight of Emma's backpack if it weighs 2/3 as much as Jacob's backpack, which weighs 8 kilograms. To calculate this, multiply Jacob's backpack weight by 2/3:
To find the weight of Emma's backpack, we need to multiply Jacob's backpack weight by 2/3. Since Jacob's backpack weighs 8 kilograms, we can calculate Emma's backpack weight by performing the following calculation: 8 kg * 2/3 = 16/3 kg = 5.33 kg (rounded to two decimal places). Therefore, a correct estimate of the weight of Emma's backpack is 5.3 kilograms.