The definition is pretty simple:

So, we only have to sum the expressions:

Answer:
(i) Lowest Temperature: Warsaw
Highest Temperature: Cairo
(ii) 27.1 + 35.2 = 62.3°C
Answer:
6
7
8
10
Step-by-step explanation:
you have to remove // to calculate

A = 47900
i = 5% = .05
n = number of compounding periods in a year (1,2,12,365)
t = number of years = 5