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vagabundo [1.1K]
3 years ago
10

A student has passed 70 percent of the 20 quizzes he has written so far successfully. If this student takes 60 quizzes during th

e school year, and passes 85 percent of the remaining quizzes successfully, what will his average score be?
Mathematics
1 answer:
Ne4ueva [31]3 years ago
4 0
I think the answer is52.4
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Nimfa-mama [501]

Answer: b(t(h))=135h^2+180h+125


Step-by-step explanation:

Given: The number of bacteria, B, in a refrigerated food is given by the function  b(t)=15t^2-60t+125 , where t is the temperature of food in degrees Fahrenheit.

The function t(h)=3h+4 gives the temperature, t, of the food h hours after being removed from the refrigerator.

Now, the number bacteria in the food in h hours is given by:-

b(t(h))=15(3h+4)^2-60(3h+4)+125\\=15(9h^2+16+24h)-180h-240+125\\=135h^2+240+360h-180h-240+125\\=135h^2+180h+125

So, The number bacteria in the food in h hours is given by:

b(t(h))=135h^2+180h+125


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