Answer: b. 70%
Step-by-step explanation:
Given : Nik logs the following hours meeting with clients (c) or doing other work (o) :
Mon: 6 c, 4 o
Tue: 8 c, 2 o
Wed: 9 c, 1 o
Thu: 7 c, 3 o
Fri: Off
The number of hours Nik spend with clients on Thursday = 7 [Number of corresponding to c is 7 in the table]
Total hours he spend in work on Thursday = 7+3 = 10
The percent of time Nik spent with clients on Thursday :

Hence, the Nik spent 70% of his time with clients on Thursday.
Thus , the correct option is b. 70%.
The doubling time is time it takes for a population to double in size/value. ... When the relative growth rate (not the absolute growth rate) is constant, the quantity undergoes exponential growth and has a constant doubling time or period, which can be calculated directly from the growth rate.
Answer:
327.6 €
Step-by-step explanation:
you can solve with an equation
1£ : 1.17€ = 280£ : x
1 : 1.17 = 280 : x
x = 1.17 * 280 : 1
x = 327.6
-------------------
check
1 : 1.17 = 280 : 327.6
0.85 = 0.85
the answer is good
------------------------------------
or you can simpy solve with a multiplication
280 * 1.17 = 327.6