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Mekhanik [1.2K]
3 years ago
10

A farmer was interested in determining how many grasshoppers were in his field. He knows that the distribution of grasshoppers m

ay not be normally distributed in his field due to growing conditions. As he drives his tractor down each row he counts how many grasshoppers he sees flying away. After several rows he figures the mean number of flights to be 57 with a standard deviation of 12. What is the probability of the farmer will count 52 or fewer flights or 60 or more flights on average in the next 40 rows down which he drives his tractor?
Mathematics
1 answer:
Inessa05 [86]3 years ago
5 0

Step-by-step explanation:

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There are 49 counters in a bag.
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Explanation:

49-20=29 blue counters

There’s a 29/49 chance that the counter will be blue
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138 trash bags cost $16.50 what is the cost of one bag?
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Each bag costs $8.30 each since 138/16.50 is around $8.30
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The class average for the first social studies test in Hannah's class is 85%. A total of 23 students took the test. When the 24
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73.8

Step-by-step explanation:

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3 years ago
Evaluate the expression when x=10, y=−2, and z=−5. −x2+6z/y=
goldfiish [28.3K]

- (10)2 + 6(-5)/(-2)

- 20 + -30/-2

- 20 + 16

4 ( I think)

8 0
4 years ago
To send a standard letter through First-Class mail, the cost depends on the weight of the letter. Any letter one ounce or less w
Hitman42 [59]

Answer:

Let x represents the total weight of the parcel and f(x) represents the cost of the parcel,

Then, according to the question,

Any letter one ounce or less will need $0.46 in postage.

That is, For 0 < x ≤ 1, f(x) = 0.46

For each additional ounce over that, or any part of an ounce, the sender must add $0.20 more postage,

Also, the maximum weight = 16 ounces,

0.46 + 0.20 (x-1)= 16

⇒ 0.20 (x-1) = 15.54

⇒ x-1 = 77.7⇒ x = 78.7

Hence, the function that shows the cost of the letter having weight greater than 1 ounces is,

And, for 1 < x ≤ 78.7 f(x) = 0.46 + 0.20(x-1),

Thus, the complete function that shows the given situation is,

f(x) = \begin{Bmatrix}0.46, & 0\leq x\leq1\\ 0.46+0.20(x-1) & 1

Thus, we get two line, y = 0.46 and y = 0.46 + 0.20(x-1),

Which are plotted in the below graph.

3 0
3 years ago
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