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Triss [41]
3 years ago
13

Use the rules for logarithms and exponents to write this equation in logarithmic form.?

Mathematics
1 answer:
Papessa [141]3 years ago
7 0

Answer:

ln K = ln (A) -\frac{\Delta H}{RT}

Step-by-step explanation:

For this case we have the following expression:

K = A e^{-\frac{\Delta H}{RT}}   (1)

And we want to find the value of ln K. If we apply natural log on both sides of the equation (1) we got:

ln K = ln(A e^{-\frac{\Delta H}{RT}})

Using the following property:

ln(xy) = ln (x) + ln(y) for x and y real numbers, x>0, y>0, then we have:

ln K = ln (A) + ln (e^{-\frac{\Delta H}{RT}})

Now since the natural log and the exponentiation are inverse operations we have this:

ln K = ln (A) + (-\frac{\Delta H}{RT})

And then the final expression for ln K is :

ln K = ln (A) -\frac{\Delta H}{RT}

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I have 10 goats, n of which are male. I need to choose 2 of them to make a casserole.
snow_tiger [21]

Answer: There are 4 male goats.

Step-by-step explanation:

We know that n of the 10 goats are male.

The probability that in a random selection, the selected goat is a male, is equal to the quotient between the number of male goats (n) and the total number of goats (10)

The probability is;

p = n/10

Now the total number of goats is 9, and the number of male goats is n -1

then the probability of selecting a male goat again is:

q = (n-1)/9

The joint probability (the probability that the two selected goats are male) is equal to the product of the individual probabilities, this is

P = p*q = (n/10)*((n-1)/9)

And we know that this probability is equal to 2/15

Then we have:

(n/10)*((n-1)/9) = 2/15

(n*(n-1))/90 = 2/15

n*(n-1) = 90*2/15 = 12

n^2 - n = 12

n^2 - n - 12  = 0

This is a quadratic equation, we can find the solutions if we use Bhaskara's formula:

For an equation:

a*x^2  + b*x + c =  0

The two solutions are given by:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

For our case, the solutions will be:

n = \frac{1 +- \sqrt{(-1)^2 - 4*1*(-12)} }{2*1 } = \frac{1+- 7}{2}

The two solutions are:

n = (1 - 7)/2 = -3    (this solution does not make sense, we can not have a negative number of goats)

The other solution is:

n = (1 + 7)/2 = 4

This solution does make sense, this means that we have 4 male goats.

5 0
3 years ago
What is 10500 m = ..... km?
Vinvika [58]
Since there are 100p meters in a kilometer you divide 10500 by 1000 and you get 10.5 km
8 0
3 years ago
Read 2 more answers
Help me please please please
avanturin [10]

Answer:

3.33lbs. repeating?

Step-by-step explanation:

I think it would just be 10/3 and be 3.33333333 and so on. (im just taking a guess)

3 0
2 years ago
5.8 cm converted into cm
agasfer [191]

Answer:

but it is already in cm

5.8 cm is 5.8 cm   but if you want mm

5.8 cm is 58 mm

Step-by-step explanation:

8 0
3 years ago
Given the equation of the line y=2.5x + 1, what is the x-coordinate, when x=10
stich3 [128]

Answer:

“We need to accept that we won’t always make the right decisions, that we’ll mess up royally sometimes – understanding that failure is not the opposite of success, it’s part of success.” – Arianna Huffington

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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