Question

How many mg is 4.0×10⁻² lb? (1 kg = 2.20 lb)
A) 18 mg
B) 36 mg
C) 82 mg
D) 90 mg

Answer 1

To convert 4.0×10⁻² lb to mg, first convert pounds to kilograms by dividing by 2.20. Then, convert kilograms to milligrams by multiplying by 1000. The approximate answer is 1818 mg.

Step-by-step explanation:

To convert from pounds to milligrams, we can follow the given conversion: 1 kg = 2.20 lb. First, we need to convert pounds to kilograms by dividing 4.0×10⁻² lb by 2.20 lb/kg.

(4.0×10⁻² lb) ÷ (2.20 lb/kg) = 1.81818182 kg

Next, we can convert kilograms to milligrams by multiplying the result by 1000 mg/g.

(1.81818182 kg) × (1000 mg/g) = 1818.18182 mg

Rounding to the nearest whole number, we get approximately 1818 mg.