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
RSB [31]
3 years ago
7

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 260260 engin

es and the mean pressure was 44 lbs/square inch. Assume the variance is known to be 0.640.64. If the valve was designed to produce a mean pressure of 4.14.1 lbs/square inch, is there sufficient evidence at the 0.020.02 level that the valve does not perform to the specifications? State the null and alternative hypotheses for the above scenario.
Mathematics
2 answers:
Scrat [10]3 years ago
5 0

Answer:

u= 4.7

u< 4.7

NeTakaya3 years ago
5 0
The correct answer is U = 4.7.
You might be interested in
It took a submarine 30 seconds to sink 225 feet, moving at a constant speed. The captain wants to know the submarine's speed.
Vladimir [108]

Answer:

Speed per second= 7.5 feet per second

Step-by-step explanation:

Giving the following information:

We have a distance (225 feet), and a time (30 seconds). Also, we know that the speed was constant.

<u>All we have to do is divide the distance by the time and determine the speed per second:</u>

Speed per second= distance / time

Speed per second= 225 / 30

Speed per second= 7.5 feet per second

5 0
3 years ago
Help pls will mark branliest !
Mnenie [13.5K]

Answer:

10 Numbers

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
An angle measures 42° more than the measure of its complementary angle. What is the measure of each angle?
Vanyuwa [196]

Answer:

24° and 66°

Step-by-step explanation:

Angle 1 = x

Angle 2 = x + 42°

x + x + 42° = 90°

Subtract 42° from both sides and add

2x = 48°

Divide by 2

x = 24°

24° and 66°

Hope this was useful to you!

3 0
3 years ago
Read 2 more answers
7th grade math pls help
Yakvenalex [24]

Answer:

"A" IS THE ANSWER

Step-by-step explanation:

8 0
3 years ago
Simplify 6 to the 5th power over 7 to the 3rd power times 2
Anon25 [30]
My answer -

<span>1. Use symbols (not words) to express quotient
 

2. Use exponent symbol (^) to denote exponents

3. Just write out question number, question, and choices. No need for extra information (such as points). Also, don't leave blank lines between choices. This extraneous that we don't need just makes your whole question very very long, and means a lot of scrolling on our part.
 

4. You should only post 2 or 3 questions at a time.


1) (6x^3 − 18x^2 − 12x) / (−6x) = −x^2 + 3x + 2 ----> so much simpler to read !

2) (d^7 g^13) / (d^2 g^7) = d^(7−2) g^(13−7) = d^5 g^6 ----> much easier to read !

3) (4x − 6)^2 = 16x^2 − 24x − 24x + 36 = 16x^2 − 48x + 36

4) (x^2 / y^5)^4 = (x^2)^4 / (y^5)^4 = x^8 / y^20

5) (3x + 5y)(4x − 3y) = 12x^2 − 9xy + 20xy − 15y^2 = 12x^2 + 11xy − 15y^2

6) (3x^3y^4z^4)(2x^3y^4z^2) = (3*2) x^(3+3) y^(4+4) z^(4+2) = 6 x^6 y^8 z^6

7) 5x + 3x^4 − 7x^3 ----> Fourth degree trinomial

8) (5x^3 − 5x − 8) + (2x^3 + 4x + 2) = 7x^3 − x − 6

9) (x − 1) + (2x + 5) − (x + 3) = x + 1

10) (−4g^8h^5k^2)0(hk^2)^2 = 0 (anything multiplied by 0 = 0)
or.. (−4g^8h^5k^2)^0(hk^2)^2 = 1 (h^2 (k^2)^2) = h^2 k^4

Last question shows why it is so important to use proper symbols (such as ^ to indicate exponents). Without such symbols, I could not tell if the 0 was an actual number and part of multiplication, of if 0 was an exponent of the expression preceding it.


P.S

Glad to help you have an AWESOME!!! day :)
</span>
6 0
4 years ago
Other questions:
  • What is the volume ofor a cubold 50m by 3cm by 6cm
    9·2 answers
  • A line is parallel to y= 1/2x +6 and passes through (–8, 0). What is the equation of the line?
    9·2 answers
  • Neil goes to the pet shop and selects a treat for his dog. He chooses one, then chooses another. What is the probability Neil se
    5·1 answer
  • How do you make millimeters to meters?
    9·2 answers
  • Explain how you could find the volume of a cube that has an edge of e
    6·1 answer
  • If you subtract 12 from my number and multiply the difference by-3 the result is -54 what is my number
    10·1 answer
  • What’s the percent of 4.3% of 1200
    13·2 answers
  • Help me please! It would be nice to get help
    15·1 answer
  • TIMED TEST WILL MARK BRAINLIEST PLEASEEE HELP
    9·1 answer
  • Find the missing angle​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!