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
Sophie [7]
2 years ago
7

Please help and hurry 12 points

Mathematics
2 answers:
schepotkina [342]2 years ago
8 0
I think that D is the answer
olga_2 [115]2 years ago
4 0
I believe that the answer is A
You might be interested in
Which equation has a product greater than the unknown factor being multiplied
bixtya [17]

Answer:

multiply and divide

Step-by-step explanation:

I think that equation needs a product like multiplication and division

7 0
3 years ago
Simplify this expression:<br> i ^257
Katarina [22]
Okay! 
What is i? 
i = <span>√(-1)

What is i^2? 
i^2 = </span>√(-1) * <span>√(-1) 

Note: Whenever you multiply two square roots with the same numbers you get this: 

</span><span>√(a^2)
</span>
Or in this case: 

√(-1 * -1) = -<span>√(1) = -1
</span>
So, 
i^2 = -1

What does i^3 equal? 
i^3 = √(-1) * √(-1) * √(-1) = 1 * √(-1) = <span>√(-1) which is... -i
</span>
What does i^4 equal? 
i^4 = √(-1) * √(-1) * √(-1) * √(-1) =  √(-1 * -1 * -1 * -1) = 1

After that the cycle does it thing and cycles back. 
So, with this information we can figure out what i^157 equals. 

Knowing long division here helps a lot!
Take 157 and divide it by 4 using long division. If you don't know it, I'll show you how to do it to the best of my abilities. (Refer to the picture. If you have any questions about it then ask. Even if the question is... what does this say?) 

After using long division we see that we get: 
39 with a remainder of 1. 

What that means is: 
(i^4)^39 is what we have. The remainder of 1 means that we have 1 i left. So our answer is i. 

The reason we divided by 4 and not some other term is because i^4 = 1, so it is easy to work with. In this case (i^4)^39 still just equals 1. Which leaves our remainder as our answer. 

So once again the final answer is: 
i

As for i^257. I'll show you the answer, but I won't give the work for this one. I'd recommend you try it out for yourself. 

i^257 = (i^4)^64 * i = i.

I hope that I helped, and if you have any further questions then ask away! 


8 0
3 years ago
Is 8 ft greater than 100 inches?
lorasvet [3.4K]
Nope, 8ft is equal to 96 inches.
8 0
3 years ago
Read 2 more answers
Dave has $8000 in a savings account, $6000 invested in the stock market, he
Agata [3.3K]

Answer:

D. $11,800 Dave's net worth

5 0
3 years ago
A manufactured product has a length that is normally distributed with a mean of 12 cm. The product will be unusable if the lengt
Sav [38]

Answer:

a) σ  = 0,1612

b) P [ 11,75 < X < 12,35] = 0,92,44   or    92,44 %

Step-by-step explanation:

NOTE: I assume the unusable length s 11,5 and less

a) For a normal distribution, the probability of P = 0,01 corresponds to z(score) =  -3,1 then:

- 3,1 = ( X - μ₀ ) / σ

- 3,1 = (11,5 - 12 )/ σ

-3,1 = - 0,5 / σ

σ  = 0,1612

b) If σ = 0,1612

P [ 11,75 < X < 12,35]

z₁ (score)  = ( 11,75 - 12 ) / 0,1612

z₁  = - 0,25/ 0,1612

z₁  = -1,55

From z table  P [ 11,75 < X] = 0,0606

z₂ (score) = ( 12,35 - 12) / 0,1612

z₂ = 0,35 / 01612

z₂ = 2,17

From z table  P [ X < 12,35] = 0,9850

Finally P [ 11,75 < X < 12,35] = 0,9850 -  0,0606

P [ 11,75 < X < 12,35] = 0,92,44   or    92,44 %

5 0
3 years ago
Other questions:
  • Which graph correctly solves the system of equations below? x2 + y2 = 4 y = x + 2
    7·2 answers
  • D/3+10=7 solve problem
    12·1 answer
  • Please help
    9·1 answer
  • What is 0.6(10n+25)=10+5n
    12·1 answer
  • This question is worth 50 points, make sure to provide ALL calculations without using a calculator, though.
    12·1 answer
  • -9h - 15 = 93 Need help. Not that good at solving two step equations. Algebra's tricky. Please solve.
    14·1 answer
  • PLEASE HELP!!!
    5·1 answer
  • Standard divisors and quotas
    15·1 answer
  • Evaluate the expression | 10 | =
    12·2 answers
  • Find geometric mean of 30 and 12
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!