5 cars and 9 motorbikes had their tires changed.
38÷4= 9.5 motorbikes
14-9=5 cars
9×2=18 5×4= 20 (add together) = 38 tires
Answer:
1/250 W/m² or 0.004 W/m² or 4 mW/m²
Step-by-step explanation:
The cargo worker is (50 m)/(1 m) = 50 times the reference distance. The intensity varies as the inverse of the square of the distance, so will be ...
(1/50)²×(10 W/m²) = 10/2500 W/m² = 1/250 W/m²
This might be more conveniently written as 4 mW/m².
