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Oksanka [162]
2 years ago
11

Need help with question

Mathematics
1 answer:
aalyn [17]2 years ago
3 0
What is the question
You might be interested in
How many students are in the freshman class.
maxonik [38]

Answer:

202

Step-by-step explanation:

SOPH= 262

FRESH= 202

JUNIOR= 354

SENIOR= 606

TOTAL 1424

8 0
3 years ago
F is a twice differentiable function that is defined for all reals. The value of f "(x) is given for several values of x in the
nadezda [96]

The correct answer is actually the last one.

The second derivative f''(x) gives us information about the concavity of a function: if f''(x) then the function is concave downwards in that point, whereas if f''(x)>0 then the function is concave upwards in that point.

This already shows why the first option is wrong - if the function was concave downwards for all x, then the second derivate would have been negative for all x, which isn't the case, because we have, for example, f''(8)=5

Also, the second derivative gives no information about specific points of the function. Suppose, in fact, that f(x) passes through the origin, so f(0)=0. Now translate the function upwards, for example. we have that f(x)+k doesn't pass through the origin, but the second derivative is always f''(x). So, the second option is wrong as well.

Now, about the last two. The answer you chose would be correct if the exercise was about the first derivative f'(x). In fact, the first derivative gives information about the increasing or decreasing behaviour of the function - positive and negative derivative, respectively. So, if the first derivative is negative before a certain point and positive after that point. It means that the function is decreasing before that point, and increasing after. So, that point is a relative minimum.

But in this exercise we're dealing with second derivative, so we don't have information about the increasing/decreasing behaviour. Instead, we know that the second derivative is negative before zero - which means that the function is concave downwards before zero - and positive after zero - which means that the function is concave upwards after zero.

A point where the function changes its concavity is called a point of inflection, which is the correct answer.

7 0
2 years ago
In 1970, a farmer using a two-row combine with a corn head could easily harvest 0.75 ha (1.85 acres) per hour and a typical corn
Anastaziya [24]

Answer:

The value is w = 6.7 \%

Step-by-step explanation:

Generally the productivity rate is mathematically represented as

P_r =  K  * Z

Here K is the ha the farmer could harvest in an hour and Z is a typical yield of corn in kg/ha

Now considering 1970

The productivity rate is

P_r =  0.75   *5000

=> P_r =  3750 \  kg/h

Now considering 1940

The productivity rate is given as P_R =  250 \ kg/h

Generally the productivity ratio is mathematically ration is mathematically represented as

w =  \frac{P_R}{P_r}  * 100

=> w =  \frac{250}{3750}  * 100

=> w = 6.7 \%

5 0
3 years ago
Is n+4 equal to 8(n - 4)
weqwewe [10]
No, n+4=4n an 8(n-4)=32n
4 0
3 years ago
Read 2 more answers
Cual es la de Raiz de 2000
serg [7]

2000 | 2

1000 | 2

500 | 2

250 | 2

125 | 5

25 | 5

5 | 5

1

√2000 = √2².√2².√5².√5

√2000 = 2.2.5√5

√2000 = 20√5

(aproximadamente 44.72135955)

4 0
3 years ago
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