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yaroslaw [1]
3 years ago
15

If Mrs. Kliesch’s Thrive class has 9 students and 6 of the students are girls, what percent of her class is girls?

Mathematics
1 answer:
Lelechka [254]3 years ago
6 0

Answer:

30% of girls in her class

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Answer: You need to wait at least 6.4 hours to eat the ribs.

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The initial temperature is 40°F, and it increases by 25% each hour.

This means that during hour 0 the temperature is 40° F

after the first hour, at h = 1h we have an increase of 25%, this means that the new temperature is:

T = 40° F + 0.25*40° F = 1.25*40° F

after another hour we have another increase of 25%, the temperature now is:

T = (1.25*40° F) + 0.25*(1.25*40° F) = (40° F)*(1.25)^2

Now, we can model the temperature at the hour h as:

T(h) = (40°f)*1.25^h

now we want to find the number of hours needed to get the temperature equal to 165°F. which is the minimum temperature that the ribs need to reach in order to be safe to eaten.

So we have:

(40°f)*1.25^h = 165° F

1.25^h = 165/40 = 4.125

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then the inequality is:

t ≥ 6.4 hours.

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