1. Calculate the value of 8. 1 × 103 − 2. 4 × 102 in standard form.

2. Blood comprises 8% of the weight of a human. Amy weighs 40kg. Find the weight of her blood.

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# 1. Calculate the value of 8. 1 × 103 − 2. 4 × 102 in standard form.
2. Blood comprises 8%

1. Calculate the value of 8. 1 × 103 − 2. 4 × 102 in standard form.

2. Blood comprises 8% of the weight of a human. Amy weighs 40kg. Find the weight of her blood.