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Lesechka [4]
2 years ago
13

Help we don’t know the answer

Mathematics
1 answer:
kvv77 [185]2 years ago
8 0
Hey I don’t get this
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At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 75 and a standard dev
AysviL [449]

Answer:

b) Chemistry

Step-by-step explanation:

To compare both scored we need to standardize the scores using the following equation:

\frac{x-m}{s}

Where x is the score, m is the mean and s is the standard deviation. So, 82 on chemistry is equivalent to:

\frac{82-75}{15}=0.4667

Because the mean of the scores on the chemistry final exam is equal to 75 and the standard deviation is 15

At the same way, 80 on Calculus is equivalent to:

\frac{80-83}{13} =-0.2308

Because the mean of the scores on the calculus final exam is equal to 83 and the standard deviation is 13

Now, we can compare the values. So, taking into account that -0.2308 is lower than 0.4667, we can said that the student do better in Chemistry.

5 0
3 years ago
Scientists are monitoring the populations of two insect species in a remote location in Alabama. They estimate that the current
bulgar [2K]

Answer:

2.5e-0.04x = 1.2 + 0.2x

Step-by-step explanation:

Given that:

Insect A:

Initial population, Po = 2.5 million

Rate of decline = 4%

Insect B:

Initial Population (Po) = 1.2 million

Yearly increase = 200,000 = (200,000/1,000,000) = 0.2

For insect A:

P(t) = Po(1 - r)^t = Po*e^-rt

Po*e^-rt = 2.5e^-0.04t ----(1)

For Insect B:

P(t) = Po + (yearly increase) * t

P(t) = 1.2 + 0.2t - - - - - (2)

Equating (1) and (2)

2.5e^-0.04t = 1.2 + 0.2t

3 0
3 years ago
Don't understand how to do it<br>f(n)= 23+8(n-1)<br>​
Ludmilka [50]
Can you post the provable question
8 0
3 years ago
Read 2 more answers
What is the measure of angle X
algol [13]

Answer:

30 degrees ???

Step-by-step explanation:

3 0
3 years ago
Evaluate 6j+23+kl−3, when j=3, k=7, and l=33.
Dmitry [639]

Answer:

269

Step-by-step explanation:

6(3)+23+(7)(33)-3

 \/              \/

18 + 23 + 231 - 3 = 269


3 0
3 years ago
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