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murzikaleks [220]
3 years ago
5

Is 1.66 rational or irrational

Mathematics
2 answers:
joja [24]3 years ago
8 0
It's irrational, the square root of it is 1.28840987267..... so its irrational
Misha Larkins [42]3 years ago
7 0
I believe 1.66 is irrational

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Is 50 tens 9 ones <,>,= 49 tens 35 ones
kati45 [8]
50 tens and 9 ones is less than 49 tens and 35 ones because 50 tens is 500 + 9 is 509, whereas 49 tens is 490 + 35. 
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Sam wants to surround his garden with fencing. He is using a drawing with a scale factor of 4 feet for every 1 inch.
solmaris [256]
24! 2 plus 4 is 6 and 6 times 4 for the scale factor
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Evaluate y = ln (x − 2) for the following values of x. Round to the nearest thousandth. x = 3, y = x = 4, y ≈ x = 6, y ≈
matrenka [14]

Answer:

Step-by-step explanation:

When x=3, y = ln(3-2) =  ln(1) = 0.

:::::

When x=4, y = ln(4-2) = ln(2) ≅ 0.693.

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2 years ago
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Find the discriminant and the number of real roots for this equation.
Margaret [11]

Our discriminant is 0 so, 4x^2 + 12x + 9 = 0 has one real root.

Option C is correct.

Step-by-step explanation:

we need to find the discriminant and the number of real roots for the following equation:

4x^2 + 12x + 9 = 0

The discriminant is found by using square root part of quadratic formula:

b^2-4ac

where b =12, a=4 and c=9

Putting values:

=b^2-4ac\\=(12)^2-4(4)(9)\\=144-144\\=0

To find out the number of real roots using discriminant we have following rules:

  • if discriminant b^2-4ac >0 then 2 real roots
  • if discriminant b^2-4ac =0 then 1 real root
  • if discriminant b^2-4ac <0 then no real roots

Since our discriminant b^2-4ac is 0 so, 4x^2 + 12x + 9 = 0 has one real root.

Option C is correct.

Keywords: discriminant

Learn more about discriminant at:

  • brainly.com/question/8196933
  • brainly.com/question/9328925
  • brainly.com/question/4853862

#learnwithBrainly

6 0
3 years ago
A tour operator has a bus that can accommodate 20 tourists. The operator knows that tourists may not show up, so he sells 21 tic
dalvyx [7]

Answer:

The expected revenue of the tour operator is 985.

Step-by-step explanation:

There are two outcomes:

Either less than 21 tourists show up and the operator does not have to pay anything. Or 21 tourists show up and the operator has to repay 100.

Anyways, initially he gets the price of all the tickets sold. That is 21 each at 50, so R = 21*50 = 1050.

Then, we need to find the probability that all of the 21 tourists show up. In this case, we have to subtract 100 from the revenue.

Each tourist has a 0.02 probability of not showing up. This means that each has a 1-0.02 = 0.98 probability of showing up. So the probability P that all 21 tourists show up is P = (0.98)^{21} = 0.6542.

So, the expected revenue of the tour operator is

R = 1050 - 100P = 1050 - 100(0.6542) = 984.58

Rounded up, the expected revenue of the tour operator is 985.

6 0
3 years ago
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