Here is part of a railway timetable. Norwich
0655
0710
0755
0805
0737
0752
0830
0847
Ipswich
Colchester
0812
0906
London
0848
0903
0933
0955
0848
a) At what time does the first train arrive in London?
b) How long does it take the 0710 train from Norwich to arrive at Colchester?
hours 2 minutes
1
c) Carys gets to Norwich station at 0750.
How long will she have to wait for a train directly to Colchester?
11 minutes

I dont get this question

Step-by-step explanation:

the answer is 24

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.