Answer:
a) 
b) 
c) For this case we have the total sales $ 15 millions after t =4 months
d) 
e) This value represent the increase in the amount of sales in millions after t=4 months
Explanation:
For this case we have the following function for the sales

Part a
For this case we want to find the derivate of S respect to t and we got:

Part b
For this case we want to find the value of S when t = 4 so if we replace we got:

Part c
For this case we have the total sales $ 15 millions after t =4 months
Part d
For this case we just need to replace t=4 in the derivate and we got:

Part e
This value represent the increase in the amount of sales in millions after t=4 months
Kung ako ay magiging Pangulo nang Pilipinas, ang limang programa na aking gagawin ay ang Magtanim ng mga puno sa kagubatan para maiwasan ang flood, pagpapa-aral sa mga batang hindi nag-aaral, Pagbibigay ng tulong sa sapat na pambili, Pagtupad ng mga batas na nakakabuti sa mga mamamayan, pagtulong sa mga may sakit.
Answer: Control activities
Explanation: In simple words, control activities refers to the policies and procedures that help the management to reduce the risk they have identified. These activities reports as a support structure for other operating activities of the business.
In the given case, hexa company has policies and procedures that supports managements initiatives. Hence the given case depicts the control activities element.
Answer:
Network externality is the correct answer.
Explanation:
It could be caused by the fact that the target CPA bid was lower than the expected or recommended amount