You need to work out the other route via You need to find out how long the journey to the campsite will take.
You expect to drive an average of 40 miles per hour.
Sketch of routes and driving distances (not to scale)
Home
167km
Harwich
Ferry
240km
Hook of
Holland
26km
Campsite
Dover
320km
Ferry
Calais
1 kilometre =
5
mile
8
Dover - Calais ferry times
Price
Departure
Arrival
(car + up to four
passengers)

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.