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Yakvenalex [24]
2 years ago
9

The air quality index, or AQI, measures how polluted the air is in your city and assigns a number based on the quality of the ai

r. Over 100 is unhealthy. . . Given the following quadratic regression equation, estimate the number of days the AQI exceeded 100 in the year 1988. . . n = 1.76t^2 - 13.32t + 41.00. (let t represent the number of years since 1990. therefore, t = 0 corresponds the year 1990. round to the nearest whole day.). . A. 60 days. B. 75 days. C. 61 days. D. 21 days
Mathematics
2 answers:
vaieri [72.5K]2 years ago
7 0
There are several information's already given in the question. The answer to the question can be easily deduced using those given information's. 

From the given question we come to know that
t = -2
Then
n = 1.76t^2 - 13.32t + 41.00
   = [1.76 * (-2)^2] - [13.32 * (-2) + 41
   = 7.04 - ( - 26.64) + 41
   = 7.04 + 26.64 + 41
   = 74.68
   = 75
From the above deduction, we can conclude that the correct option among all the options that are given in the question is the second option or option "B".
Eva8 [605]2 years ago
5 0

Answer:

b. 75 days

Step-by-step explanation:

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On a track and field team, 8% of the members run only long-distance, 32% compete only in field events, and 12% are sprinters onl
kondor19780726 [428]

Answer:

0.40

Step-by-step explanation:

Members who run only  long distance = 8%

So, probability that a member will run only long distance = P(A) = 0.08

Members who compete only in field events = 32%

So, probability that a member will compete only in field events = P(B) 0.32

Members who are sprinters = 12%

So, probability that a member is sprinter = P(C) 0.12

We have to calculate the probability that a randomly chosen team member runs only long-distance or competes only in field events. i.e we have to find P(A or B). Since these events cannot occur at the same time, we can write:

P(A or B) = P(A) + P(B)

Using the values, we get:

P(A or B) = 0.08 + 0.32 = 0.40

Thus, the probability that a randomly chosen team member runs only long-distance or competes only in field events is 0.40

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3 years ago
95% as a fraction in its simplest form
Harlamova29_29 [7]
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divide by 5.. 
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Each month, Angela budgets $1340 for fixed expenses, $850 for living expenses, and $60 for annual expenses. Her annual net incom
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Need help with this !
gulaghasi [49]

Answer:

(-2,14) Hope this helps! Have a great day!!!

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