Q5.
gary's motorbike uses petrol.
gary needs to mix oil with the petrol.
he mixes oil and petrol in the ratio 1: 14 by volume.
gary is going to ride his motorbike 3000 miles.
each 20 miles he rides uses 1 litre of the oil and petrol mixture.
a 500 ml bottle of oil costs £3.99
work out the total cost of the bottles of oil gary needs to buy.
(1 litre = 1000 m)
you must show all your working.

For every 20 miles he needs 1 liter of oil.

You are told 1 liter = 1000 ml

So for 1 liter of oil he needs to buy 2 bottles ( 500ml + 500ml = 1000 ml = 1 liter)

The cost of 2 bottles is 3.99 + 3.99 = 7.98

Now divide total miles by miles per liter, which the problem says 20 miles:

3000 miles / 20 = 150

He will need 150 liters of oil.

Multiply the cost for 1 liter by number of liters needed:

150 x 7.98 = £1,197

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

contact me if you have any questions you are welcome.

one fourth of 9% = 2.25%

gavin is correct in saying : the equivalent quarterly interest rate would be

2.25%.