True, all of them represent a negative number, for example:
You have $60 and you spent $10, the remaining money is:
Your savings are $1000 and you make a Withdrawal of $500:
In other words for calculation purposes, they all have negative values
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1 answer:
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Answer:
40,000 units on the first day then 18% per week
Step-by-step explanation:
Exponential function:
An exponential function has the following format:
In which r is the rate of change, as a decimal.
In this question:
The number of phones sold in thousands of units per day, in t weeks since the date of release, is:
Since , it solds 40,000 on the first week.
The rate of percentage increase is:
1 + r = 1.18
r = 0.18
So an increase of 0.18 = 18% a week.
So the correct option is:
40,000 units on the first day then 18% per week