Please help, show work!!! :))
1 answer:
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Answer: Option A
Step-by-step explanation:
Note that for the initial year, 1990, the population was 5.3 billion.
The exchange rate is 0.09125 billion per year. In other words, each year there are 0.09125 billion more people.
In year 2 there will be 0.09125 * 2 billion people
In year 3 there will be 0.09125 * 3 billion people
In year 4 there will be 0.09125 * 4 billion people
In year t there will be 0.09125 * t billion of people
So the equation that models the number of people that there will be as a function of time is:
Where is the initial population
billion
r is the rate of increase
billion per year
finally the equation is:
The correct answer is option A.
A unit multiplier is a conversion factor of value 1 that we can use to convert quantities.
We want to convert 123 pounds per mile to ounces per centimeter.
First, we are going to express the quantity to convert as a fraction:
123 pounds per mile=
Next, we are going to find our multipliers:
- We know for our problem that there are 5,280 feet in 1 mile, so our first multiplier will be:
- We also know that there are 16 ounces in 1 pound, so our second multiplier will be:
- We know that there are 12 inches in 1 foot, so our third multiplier will be:
- We know that t<span>here are approximately 2.54 cm in 1 inch, so our fourth multiplier will be: </span>
Now we can put all our multipliers together:
We can conclude that the answer is 0.01
We want to convert 123 pounds per mile to ounces per centimeter.
First, we are going to express the quantity to convert as a fraction:
123 pounds per mile=
Next, we are going to find our multipliers:
- We know for our problem that there are 5,280 feet in 1 mile, so our first multiplier will be:
- We also know that there are 16 ounces in 1 pound, so our second multiplier will be:
- We know that there are 12 inches in 1 foot, so our third multiplier will be:
- We know that t<span>here are approximately 2.54 cm in 1 inch, so our fourth multiplier will be: </span>
Now we can put all our multipliers together:
We can conclude that the answer is 0.01