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Molodets [167]
3 years ago
15

Value of 81 to the power of - 1/2​

Mathematics
2 answers:
scZoUnD [109]3 years ago
8 0

Answer:

9

Step-by-step explanation:

81 to the power of 1/2 is the same as the square root of 81, which gives 9. It's because the square root has an invisible 2 which most of you can't see with your mathematical eye and 81 is raised to the power of 1 inside the square root.

Leokris [45]3 years ago
5 0

Answer:

1/9

.........................

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The focus of a parabola is (0, -3) and the directrix is y = 3. What is the equation of the parabola?
mart [117]
Focus has coordinates (0, a)
a = -3
Thus, 4a = 4(-3) = -12

Because a is negative, we know it will be a concave down or concave left parabola. Hence, A and D can be eliminated. And we know it has to be B because the directrix is the horizontal line y = 3. Hence, the equation of the parabola becomes:

x^{2} = -12y or y = -\frac{1}{12}x^{2}
5 0
3 years ago
Find the truth set of 2x-6≤5(3-x)​
garri49 [273]

Answer:

x∈(-∞,3]

Step-by-step explanation:

2x-6<=5*3-5x

2x-6<=15-5x

+5x        +5x

7x-6<=15

+6       +6

7x<=21

:7     :7

x<=3

x∈(-∞,3]

4 0
3 years ago
What are the real solutions of the equation x^4= 81?
zmey [24]
Use photomath it’s free
5 0
3 years ago
Emily put toys into a square box that is 46 centimeters long. How many square centimeters is the bottom of the box?
Sedaia [141]
If the box is a square and the length of one side is 46cm, then the area of the box in square centimeters is 46 * 46 = 2116.
Final Answer:
d. 2116
Hope I helped :)
7 0
3 years ago
A certain organization recommends the use of passwords with the following​ format: vowel commavowel, consonant comma consonant c
zimovet [89]

The password format is = inpray93

vowel , consonant, consonant, consonant, vowel, consonant, number, number.

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Since, there are 21 consonants and repetition is allowed so for 2nd, 3rd, 4th, and 6th positions 21 choices are available. For 1st and 5th positions, 5 choices  are available and for 7th and 8th position there are 10 choices (0 to 9).

Passwords are not case sensitive which means upper case and lower case letters are same.

So, the number of passwords can be =

5\times21\times21\times21\times5\times21\times10\times10

= 486202500

Part (b) question is not given. But it can be opposite to the first part i.e when the password letters are case sensitive.

This means all the letters are different.

So, number of passwords will be =

10\times42\times42\times42\times10\times42\times10\times10

= 31116960000

4 0
3 years ago
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