Question

David drove a distance of 187km, correct to 3 significant figures. He used 28 litres of petrol, correct to 2 significant figures.
The petrol consumption of a car, in km per litre, is given by the formula c=d/p
considering bounds work out the value of c for david’s journey to a suitable degree of accuracy

Answer 1

David drove a distance (d) of 187km, to 3 significant figures. He used 28 litres of petrol (p), to 2 significant figures.
The petrol consumption (c) in km per litre is given by the formula: c= d/p
By considering bounds, work out the value of c, to a suitable degree of accuracy. You must show your working and give a reason for your answer. I'm not totally comfortable with sig figs, but I believe that the answer can only be expressed as accurately as least number of sig figs of any data used in the computations.....thus ....the answer should be rounded to 2 sig figs

So

187 / 28 = 6.67 ⇒ 6.7 km / L [rounded to 2 sig figs ].

Answer 2

Answer:

upper bound for 187 = 187.5

lower bound for 187 = 186.5

upper bound for 28 = 28.5

lower bound for 28 = 27.5

lowest possible petrol consumption = 6.543859649

highest possible petrol consumption = 6.818181818

petrol consumption = 7

because the upper and lower bounds both agree to this number of figures

p.s this was a question in my mathwatch homework and i got 5/5 marks on it.

brainliest plz?