For the second question the options are: 71034, 71034000, 710.34 and 7013.4

Step-by-step explanation:

Solving (a):

Standard form is represented as:

where

Move the decimal point to 5 and count the number of times the decimal point is moved forward (forward represents negative).

So:

Hence:

Solving (b):

Express as

This gives:

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e