Answer:

Step-by-step explanation:
we know that
The equation of a exponential growth function is given by

where
y is the population
x is the time in years since year 2015
a is the initial value
r is the rate of change
we have

substitute


In the year 2040 the value of x is equal to

substitute

longest leg = 2
The longest leg is opposite the 60° angle
= 4 × sin60°
= 4 ×
/ 2 = 2