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Damm [24]
3 years ago
14

The McCalls insured their house for 90% of it's value. If the house is valued at $84,000, how much is it insured for?

Mathematics
2 answers:
krok68 [10]3 years ago
8 0
The question is just asking for 90% of 84,000. To do this, you can change 90% into decimal by moving the decimal 2 place over which gives .90

After that, you multiply .90 by 84,000 which is $75,600

Another way to do this is to convert 90% to a fraction. To do that, you would put 90/100 which can simplify to 9/10. Then you would multiply that by 84,000. 1 of the 0's can cancel, so you are left with 9x8,400 which gives the same answer
noname [10]3 years ago
6 0
84000 * 0.90 (equivalent to 90%) = $75600
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A. Total Revenue (R) is equal to price per dive (P) multiplied by number of customers (C). We can write R=PC.

Per price increase is $20. So four price increase is $20*4=$80. Hence, price per dive is 100+80=$180.

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B. Each price increase is 20. So x price increase is 20x. Hence, new price per dive would be equal to the sum of 100 and 20x.

Also per price increase, customers decrease by 2. So per x price increases, the customer decrease is 2x. Hence, new number of customers is the difference of 30 and 2x.

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C. We are looking for the point (x) at which the equation modeled in part (B) gives a maximum value of revenue (y). That x value is given as x=-\frac{b}{2a}, where a is the coefficient of x^{2} and b is the coefficient of x. So we have,

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A. $3960

B. R=-40x^{2}+400x+3000

C. $200

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