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densk [106]
3 years ago
7

Which of the following is NOT a rational number?

Mathematics
1 answer:
scoray [572]3 years ago
5 0
I think it might be D
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236x10 to the 5 power<br> Please help
Delicious77 [7]

Answer: 23600000

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
When it's an acute triangle what do you notice about the sum of the areas of the 2 smaller squares in relation to the area of th
Ymorist [56]
They're the same because squares have 90 degree angles and that cut in half with a diagonal would make the angle acute at a 45 degree angle so depending on the lengths of the sides depends on the area, the angles have nothing to do with it because all squared have 4 right angles
5 0
3 years ago
What is the cube root of 8​
alina1380 [7]

Answer:

its 2

Step-by-step explanation:

because 2*2*2 is 8

6 0
3 years ago
Find two unit vectors orthogonal to both 8, 5, 1 and −1, 1, 0 .
Elina [12.6K]
In order to do this, you must first find the "cross product" of these vectors. To do that, we can use several methods. To simplify this first, I suggest you compute:

‹1, -1, 1› × ‹0, 1, 1›

You are interested in vectors orthogonal to the originals, which don't change when you scale them. Using 0,-1,1 is much easier than 6s and 7s.

So what methods are there to compute this? You can review them here (or presumably in your class notes or textbook):
http://en.wikipedia.org/wiki/Cross_produ...

In addition to these methods, sometimes I like to set up:
‹1, -1, 1› • ‹a, b, c› = 0
‹0, 1, 1› • ‹a, b, c› = 0

That is the dot product, and having these dot products equal zero guarantees orthogonality. You can convert that to:

a - b + c = 0
b + c = 0

This is two equations, three unknowns, so you can solve it with one free parameter:

b = -c
a = c - b = -2c

The computation, regardless of method, yields:
‹1, -1, 1› × ‹0, 1, 1› = ‹-2, -1, 1›

The above method, solving equations, works because you'd just plug in c=1 to obtain this solution. However, it is not a unit vector. There will always be two unit vectors (if you find one, then its negative will be the other of course). To find the unit vector, we need to find the magnitude of our vector:

|| ‹-2, -1, 1› || = √( (-2)² + (-1)² + (1)² ) = √( 4 + 1 + 1 ) = √6

Then we divide that vector by its magnitude to yield one solution:

‹ -2/√6 , -1/√6 , 1/√6 ›

And take the negative for the other:

‹ 2/√6 , 1/√6 , -1/√6 ›
7 0
3 years ago
Hi my sisters and brothers can tell me the answer please because I don’t understand the question
sergey [27]

Answer:

13 cm

Step-by-step explanation:

Using the Pythagoras therorem

We get the answer as

Root of (12squared +5squared)

Root of (144+25)

Root of 169

=>13 cm

3 0
3 years ago
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