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KengaRu [80]
3 years ago
11

Please Help

Mathematics
2 answers:
diamong [38]3 years ago
7 0

Answer:

the correct answer is -0.5%

Step-by-step explanation:

just took the test.

elena-14-01-66 [18.8K]3 years ago
4 0

If the rate of decay is 6% per year, that means the motorcycle retains 93% of its value every year. Because there are 12 months in a year, you can use the following equation: 
 x^12 = 0.94, 
 where x = the rate of decay each month, 12 = the number of months, and 0.94 = the retained value each year. Next, set a logarithmic function on each side as such: 
 LOG(x^12) = LOG(0.94) 
 When applying log functions, exponentials (like the 12 in the equation) are moved outside of the function like so: 
 LOG(x^12) = 12(LOG(x)) 
 Therefore, 
 12(LOG(x)) = LOG(0.94) = -0.0268721464 
 When you divide both sides by 12, the equation becomes 
 LOG(x) = -0.00223934553 
 Finally, remove the LOG from the left side by applying both sides of the each by 10^() as such: 
 10^(LOG(X)) = 10^(-0.00223934553)
 X = 0.994856987 
 Therefore, the motorcycle retains that 0.994856987 of its value every year. 
 1 - 0.994856987 = 0.005143 
 Expressed as a percentage, this value is 0.5143013%
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