David cycles at 20mph for 1¼ hours, then at 16mph for 2 hours and then 12mph for 45 minutes. (a) Work out the total distance travelled.
(b) Work out the average speed for the entire journey.

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

7.3

step-by-step explanation:

what do u need to know

step-by-step explanation:

it would rotate about 180 degrees.