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frosja888 [35]
4 years ago
8

True or false: an cubic function may have 3 irrational zeros

Mathematics
1 answer:
jolli1 [7]4 years ago
3 0
<h3>Answer: True</h3>

The key word here is "may" meaning that we could easily have 3 rational roots as well. An example of a cubic having 3 irrational roots would be

(x-1)(x-2)(x-3) = x³ - 6x² + 11x - 6

This has the rational roots x = 1, x = 2, x = 3.

However, we could easily replace 1,2,3 with any irrational numbers we want. So that's why the statement "a cubic has three irrational roots" is sometimes true.

In some cases, a cubic may only have 1 real root and the other 2 roots are imaginary.

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he table gives the probability distribution of the number of books sold in a day at a bookstore. What is the probability of 16 o
Pepsi [2]
16 or more books sold in a day will include two intervals from the given table:

a) 16 - 20 books sold.
Probability = 0.201

b) 21 - 25 books sold.
Probability = ?

Since the table gives the probability distribution, the sum of all the probabilities must be equal to 1. We are given the probabilities of 4 out 5 intervals. So in order to find the probability of the 5th interval (21-25) we can subtract the sum of probabilities of rest of the intervals from 1.
So, P(21 - 25) = 0.019

In order to find the probability of 16 or more books sold we need to sum the probabilities of both these intervals.

So, the probability of 16 or more books being sold on a given day = 0.201 + 0.019 = 0.220
4 0
3 years ago
coach kent brings 3 quarts of sport drink to coccer practice he gives the same amount to each of his 16 players how many ounceso
elena55 [62]

Answer:

6

Step-by-step explanation:

1 quart = 32 oz

3 quarts = 96 oz

96%16 = 6

please give brainlyest

3 0
4 years ago
The average of 6 numbers is 15. The average decreases by 1 when the 7th
user100 [1]

Answer:

B. 8

Step-by-step explanation:

6 0
3 years ago
Which of the following numbers is not a<br> prime number?<br> A. 2<br> C. 11<br> B. 3<br> D. 27
Bogdan [553]

Answer:

27, it is divisible by 1, 3, 9, and 27

Step-by-step explanation:

5 0
3 years ago
Determine the area of a parallelogram if<br> its base is 16 cm and its height is 7 cm.
ella [17]
<h3>Answer: 112 square cm</h3>

=====================================

Work Shown:

area = base*height

area = 16*7

area = 112 square cm

----------------

Extra info (optional section):

The area formula for a parallelogram is the same as the formula for a rectangle. Imagine tilting a rectangle so that it's slanted. The area has not changed.

Or another thing to imagine is that let's say we had a stack of 2 by 4s. If the stack is perfectly vertical, aka forming a rectangle, then we can nudge the beams so that we can form a slanted parallelogram instead. Both configurations involve the same amount of wood, and therefore would lead to the same frontal surface area.

3 0
3 years ago
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