12) Find the sum, S7 for the geometric series {1 + 5 + 25 + - + 15625).
2 answers:
<u>Understanding:</u>
The sum of a geometric series is, , with a being the start point and r is the common ratio. We can also use the following formula to make life easier
, a is your start point, r is the common ratio, and n is the number of terms, which in our case is S7.
<u>Solution:</u>
Our start point is 1, ,
The common ratio is 5, ,
And finally, the number of terms is 7, .
The answer is [A] 19531.
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Marisa, who raise the price of her earrings so that she will make a profit of $5.00 on each pair, expect to make a profit with her company.
<h3>What is the unit price?</h3>The unit price is the amount of money required to buy one unit of a item or goods.
To find the unit price, divide the total cost of the goods to the total number of goods.
The cost of repair will now be $60. Thus, the total cost of 50 earrings is,
Marisa decided to raise the price of her earrings so that she will make a profit of $5.00 on each pair. Thus, the new selling price of her earring is,
The sale's price of 50 earrings is,
She has also improved the quality control so that only 1 pair in 50 need to be returned for repair. Thus, the cost price of one earring has to be removed from the sales price of 50 earrings as,
The profit made by her company on 50 earrings is
Thus, Marisa, who raise the price of her earrings so that she will make a profit of $5.00 on each pair, expect to make a profit with her company.
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