1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Serggg [28]
2 years ago
14

Which expression is equivlent to (3^2)^-2?A) -81B) -12C) 1/81D) 1/12​

Mathematics
2 answers:
Colt1911 [192]2 years ago
6 0

Answer:

Answer: 1/81

First you simplify it to 3^-4

Then express it with a positive exponent

which goes to 1/3^4

Then evaluate it to 1/81

Andreyy892 years ago
4 0

Answer:

C) 1/81

Step-by-step explanation:

According to PEMDAS, you need to work on Parentheses first, so you should square 3.

3×3 = 9

A rule of exponents is that you can't have negative exponents, and if they show up you need to flip the side the exponent is at. (If it were at the denominator it would then have to be at the numerator)

Since the negative exponent was at (what is understood as) the numerator, you have to place it at the denominator.

Your equation should now be

1/ 9^2

Square 9

And the answer should be

1/81

You might be interested in
Determine the number of solutions for the system 6x+9y=9 amd -6x+6y=1
ozzi

Answer:

One solution

Step-by-step explanation:

4 0
2 years ago
24. 17 is 40% of what number?
EastWind [94]

Answer:

9.7

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Which of the following polygons has five lines of symmetry?
Ivan
Pentagons are and example.
6 0
3 years ago
P(x)=-4x-2<br> Find p(a-3)
Marta_Voda [28]
Answer : -4a+10

Substitute (a-3) for x
-4(a-3)-2
-4a+12-2
-4a+10 but can also be written as -2(2a-5)
7 0
2 years ago
The volume of a right cylinder is V = πr2h. If we have an oblique cylinder, like in the figure, what is the volume of a cross-se
olchik [2.2K]
Since you did not attach any picture we cannot say for sure what is the correct answer, but we can discuss the options in order to find the most probable correct answer.

First of all, according to the Cavalieri's principle, an oblique cylinder has the same volume as a right cylinder with the same base surface area and same height.
A cross-section of an oblique cylinder will be a small right cylinder with the same base surface area and a height as small as possible.

I guess the oblique cylinder has height h and it is divided into many (probably 10) cross-sections.

Option A: <span>πr2h
This is exactly the volume of the right cylinder, therefore, unless you are given a cross-section of height h (which would be too easy), this won't be the correct answer.

Option B: </span><span>4πr2h
This is 4 times the right cylinder. Again, here the height of the cross-section should</span> be 4h, but it doesn't sound like a possible data (too easy again).

Option C: <span>1 10 πr2h
Here comes a n issue with the notation: I think the right number you meant to write is (1/10)</span>·πr2h and not 110·<span>πr2h.
If I am right, this means that your oblique cylinder of height h is divided into 10 cross-sections, and therefore the volume of each of these cross-sections will be a tenth of the volume of the oblique cylinder, which means </span>1/10·<span>πr2h.

Option D: </span><span>1 2 πr2h
Here, we have the same notation issue as before. I think you meant (1/2)</span>·<span>πr2h.
Here, your oblique cylinder height h should be divided into only 2 cross-sections. Now, we said the cross-section's height should be the smallest as possible, so an oblique cylinder divided only into two pieces doesn't sound good.

Therefore, the most probable correct answer will be C) </span>(1/10)·<span>πr2h</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • Solve 5x + 7 &gt; 17. {x | x &lt; 2} {x | x &gt; 2} {x | x &lt; -2} {x | x &gt; -2}
    11·2 answers
  • Please be quick! I need this as soon as possible!
    9·2 answers
  • I need some help on this question! QUICKLY PLEASE!!!!
    6·1 answer
  • Two cars started from the same point, at 10 am, traveling in the same direction at 60 and 90 mph respectively. At what time will
    5·1 answer
  • A company makes batteries with an average life span of 300 hours with a standard deviation of 75 hours. Assuming the distributio
    12·1 answer
  • A roof has the shape of an isosceles triangle with equal sides 8 cm long and base 12 m long. What is the measure of the angle of
    11·1 answer
  • Help meh plz I just need answer question in pic
    12·1 answer
  • Question down below?
    8·2 answers
  • A rectangle is 15m longer than it is wide. Its perimeter is 72m. Find its length and width.
    6·1 answer
  • John's father has a large collection of ties. He has 20 ties, and 8 of them are pink.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!