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lightskinbaby2
02.05.2021 •
Mathematics
2.
2.
Which of the following functions would give the population Plt) as a function
of t, in years, given that the initial population is 2,500 and that the population
is growing at an annual rate of 4%?
(1) P(t)=2500(0.96)
(3) P(t)=2,500(1.04)
(2) P(t)=(1.04) +2,500
(4) P(t)= 1.04t +2,500
Solved
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Ответ:
Step-by-step explanation:
None of your proposed answers has an exponent t.
Here's the logic behind the
Year 0: pop. = 2500
Year 1: pop. = 2500(1.04) That is 104% of the previous year's pop.
Year 2: pop. = 2500(1.04)(1.04) = 2500(1.04)^2
Year 3: pop. = 2500(1.04)^2 x (1.04) = 2500(1.04)^3
See the pattern? The exponent matches the year number.
Ответ:
$0.54
Step-by-step explanation:
Given:
The jars of peanut butter that I buy cost $7.20 each and normally contain 500 grams.
At present, however, each jar contains an extra 20% free.
And additionally, the supermarket has a "buy 3 jars get another one free''.
Question asked:
By how much is the cost per 100 grams of peanut butter less than it normally is if I take full advantage of the supermarket's offer today?
Solution:
Cost of a jars of peanut = $7.20
Normally, weight of peanut butter in one packet = 500 gram
At supermarket offer, each jar contains an extra 20% free, means a packet of peanut butter contains = 500 + 20% of 500![=500+500\times \frac{20}{100} =500+100=600\ gram](/tpl/images/0568/9555/a99ab.png)
And extra benefit = buy 3 jars get another one free, means we will get 4 jars by just giving price of only 3 jars.
That means, total weight of peanut butter you are getting by giving 3 packet's price = Each jar weigh
number of jars
= 600
4 = 2400 gram
Cost of each packet will be same as previously as during the offer; $7.20
Cost of 3 packet's peanut (2400 gram) =![7.20\times3=\$21.6](/tpl/images/0568/9555/41968.png)
Now, we will calculate cost per 100 grams of peanut butter :
During offer:
Cost of 2400 grams of peanut butter = $21.6
Cost of 1 gram of peanut butter =![\frac{21.6}{2400}](/tpl/images/0568/9555/41313.png)
Cost of 100 gram of peanut butter =![\frac{21.6}{2400}\times100=\frac{2160}{2400} =\$0.9](/tpl/images/0568/9555/223a6.png)
Normal day:
Cost of 500 grams of peanut butter = $7.20
Cost of 1 gram of peanut butter =![\frac{7.20}{500}](/tpl/images/0568/9555/53a41.png)
Cost of 100 gram of peanut butter =![\frac{7.20}{500}\times100=\frac{720}{500} =\$1.44](/tpl/images/0568/9555/d6aeb.png)
We found that cost of 100 gram of peanut butter in normal day is $1.44 while cost of 100 gram of peanut butter during offer is $0.9 means cost per 100 gram during offer is ($1.44 - $0.9 = )$0.54 less than cost during normal day.
Conclusion:
Therefore, cost per 100 grams of peanut butter is $0.54 less than it is normally if you take full advantage of the supermarket's offer today.