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GarryVolchara [31]
3 years ago
10

2. In 2010, the population of a town is 8500. The population decreases by 4.5% each year.

Mathematics
1 answer:
Greeley [361]3 years ago
6 0

If the population of a certain town decreases by 4.5% each year, we form a geometric sequence with first term equal to 8,500 and r equal to 0.955.

<span>(a)   </span>The equation is then,

<span>                                          An = (8,500)(0.955)^n</span>

Where n is the number of years.

 

<span>(b)   </span>Substituting 7000 to An and solving for n,

7000 = 8500*(0.955)^n

<span>            The value of n from the equation is 4.2 years. </span>

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<h2>Question: </h2>

A shopkeeper bought wheat for rs.35000. Due to leakage in the godown 1/7 of the total wheat was spoiled. He sold the good wheat at a gain of 10% and the spoiled when at a loss of 25%. Find his total gain or loss per cent.

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<h2>step by step answer:</h2>

In the question we are given a shopkeeper or bought wheat for Rs. 35000. Now, due to leakage 17 of the total wheat is spoiled. Now, he sold the good wheat at 10% gain and the bad wheat at 25% loss. We need to find the total gain/loss percent.

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So, the cost price of good quality wheat is Rs. 30000 and selling price is Rs. 33000.

Let us find the total selling price of the wheat that the shopkeeper bought.

Now the total selling price of the wheat is Rs.3750+Rs.30000=Rs.36750.

Hence Profit = Total selling price − Total cost price

profit =Rs.36750−Rs.35000

=Rs.1750

profit %

=profitcost price×100%.

=175035000×100%.

=5%.

<h2>So, total profit is 5%.</h2>
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