It has been calculated that the average baby uses 3528 nappies which end up in landfill sites. There were 698,512 births last ye
ar in the UK. By rounding these figures to 1 significant figures, estimate the number of nappies that will be used. Give your answer in billions to 1 significant figure.
The answer is C. Why? well, you should know SOH-CAH-TOA. IN THIS CASE YOU WILL USE SOH. SINE OVER HYPOTENUSE. THEN YOU SUBSTITUTE. SIN 45°= OPPOSITE/HYPOTENUSE. SIN45°=X/13 WHICH GIVES U CHOICE C.
