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
PIT_PIT [208]
3 years ago
10

A certain alloy contains 14.25% nickel. How much nickel is there in a piece weighing 375 pounds? Round your answer to the neares

t hundredth.
A. 78.92 pounds B. 12.24 pounds C. 112.49 pounds D. 53.44 pounds
Mathematics
1 answer:
Fed [463]3 years ago
5 0
D because 375 * .1425 = 53.44
You might be interested in
How would I change this to standard form. <br><img src="https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20x%20-%201"
Pie

Answer:

x - 2y = 2

Step-by-step explanation:

the equation of a line in standard form is

Ax + By = C ( A is a positive integer and A, B are integers )

given y = \frac{1}{2} x - 1

multiply through by 2 to eliminate the fraction

2y = x - 2 ( subtract 2y from both sides )

0 = x - 2y - 2 ( add 2 to both sides )

x - 2y = 2 ← in standard form


8 0
3 years ago
An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such tha
BartSMP [9]

Answer:

The decision rule is  

Reject the null hypothesis  

Step-by-step explanation:

From the question we are told that

    The population mean is \mu =  5.6  \ pounds/inch^2

     The  sample size is  n =  160

      The sample mean is  \=  x =  5.7  \  pounds/ inch^2

     The variance is \sigma ^2 =  0.25

       The level of significance is  \alpha   =  0.01

The null hypothesis is  H_o  :  \mu  =  5.6

The alternative hypothesis is H_a :  \mu > 5.6

Generally the standard deviation is mathematically represented as

           \sigma =  \sqrt{\sigma ^2 }

=>         \sigma =  \sqrt{0.25  }  

=>         \sigma =  0.5  

Generally the test statistics is mathematically represented as

        z =  \frac{\= x  - \mu }{ \frac{\sigma}{\sqrt{n}  } }

=>     z =  \frac{5.7  - 5.6  }{ \frac{0.5 }{\sqrt{ 160 }  } }  

=>     z =  2.53

From the z table  the area under the normal curve to the left corresponding to  2.53   is

        p-value =  P(Z >  2.53 ) =0.0057

From the value obtained we see that the p-value  < \alpha hence

The decision rule is  

Reject the null hypothesis  

The conclusion is  

There is sufficient evidence to conclude that the believe  that the valve performs above the specifications is true

 

5 0
3 years ago
MATH: GRAPHS AND FUNCTIONS...HELP!
Maru [420]

Solution: Check the picture I uploaded.

4 0
2 years ago
Given points A (-3,-4) and B (2,0), points P (-1,-12/5) partitions line AB in the ratio
kvv77 [185]
\bf \begin{array}{ccccccccc}&#10;&&x_1&&y_1&&x_2&&y_2\\&#10;&A&(~ -3 &,& -4~) &#10;&P&(~ -1 &,& -\frac{12}{5}~)&#10;\end{array}&#10;\\\\\\&#10;d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}&#10;\\\\\\&#10;AP=\sqrt{[-1-(-3)]^2+[-\frac{12}{5}-(-4)]^2}&#10;\\\\\\&#10;AP=\sqrt{(-1+3)^2+(-\frac{12}{5}+4)^2}\implies AP=\sqrt{2^2+\left( \frac{8}{5} \right)^2}&#10;\\\\\\&#10;AP=\sqrt{4+\frac{64}{25}}\implies AP=\sqrt{\cfrac{164}{25}}\implies AP=\cfrac{\sqrt{164}}{\sqrt{25}}&#10;\\\\\\&#10;\boxed{AP=\cfrac{2\sqrt{41}}{5}}



\bf \begin{array}{ccccccccc}&#10;&&x_1&&y_1&&x_2&&y_2\\&#10;&P&(~ -1 &,& -\frac{12}{5}~) &#10;&B&(~ 2 &,& 0~)&#10;\end{array}&#10;\\\\\\&#10;PB=\sqrt{[2-(-1)]^2+[0-\left(-\frac{12}{5}  \right)]^2}&#10;\\\\\\&#10;PB=\sqrt{(2+1)^2+\left( \frac{12}{5} \right)^2}\implies PB=\sqrt{9+\frac{144}{25}}\implies PB=\sqrt{\cfrac{369}{25}}&#10;\\\\\\&#10;PB=\cfrac{\sqrt{369}}{\sqrt{25}}\implies \boxed{PB=\cfrac{3\sqrt{41}}{5}}

so, let's check the ratio of AP:PB

\bf AP:PB\implies \cfrac{AP}{PB}\implies \cfrac{\frac{2\sqrt{41}}{5}}{\frac{3\sqrt{41}}{5}}\implies \cfrac{2\underline{\sqrt{41}}}{\underline{5}}\cdot \cfrac{\underline{5}}{3\underline{\sqrt{41}}}\implies \cfrac{2}{3}
7 0
3 years ago
Graphing Polynomial Functions
Mekhanik [1.2K]

Answer:

table and graph attached

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Roy borrows $42,000 to purchase a new truck. How much will Roy need to pay in all if the interest is compounded annually at 3.5%
    14·1 answer
  • a bird that was perched atop 15 and a half door tree dives down six feet to a branch below. how far above the ground is the bird
    13·1 answer
  • The following set of ordered pairs of the form (x,y) lie on the graph of a function of x. {(0, -1), (1, 2), (2, 5), (3, 8)} Whic
    6·1 answer
  • Lolita reads 245 pages in 5 hours. How fast does she read? <br>     
    15·2 answers
  • I need help with 7-10 please!
    9·1 answer
  • The floor of a rectangular meeting area was waxed and everyone needs to stay out. The length of the area is 5 meters. The width
    7·2 answers
  • Help me with this question please
    12·1 answer
  • PLEASE HELP just need a quick answer!!! will give brainly!!!
    15·1 answer
  • Sasha's mom bought a container with 150
    9·1 answer
  • 3. What other transformation would give the same final position for Building 1? (1 point)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!