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
lozanna [386]
3 years ago
13

Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 6.3 parts

/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 870 samples is 6.4 ppm. Assume the variance is known to be 1.00. Does the data support the claim at the 0.1 level?
Step 4 of 5 : Enter the decision rule.
Mathematics
1 answer:
lbvjy [14]3 years ago
8 0
Ngnnghgfvnnfghbcxbnnfgjkb. Ccxc
You might be interested in
In young children, some brain cells have a ------- that
liubo4ka [24]

<u>In young children, some brain cells have a </u>plasticity <u>that enables them to take over the functions of damaged or </u><u>missing brain cells.</u>

  • Option E is correct as of the meaning of plasticity the quality of being easily shaped or moulded.
  • So according to meaning option E can be filled in the blank.
  • Option A is incorrect which means weak
  • Option B is incorrect which means a story told about past events remembered by the author.
  • Option C means having a very harmful or effect.
  • Option D is out as meaning unusual or strange in a very annoying or funny way.

Hence E is a suitable answer.

What is plasticity explain?

Plasticity, ability of certain solids to flow or to change shape permanently when subjected to stresses of intermediate magnitude between those producing temporary deformation, or elastic behaviour, and those causing failure of the material, or rupture (see yield point).

Learn more about plasticity

brainly.com/question/21219036

#SPJ4

7 0
2 years ago
the north american plate and the pacific plate have been sliding horizontally past each other along the san andreas fault line f
sammy [17]

Answer:

50 million

Step-by-step explanation:

since they're moving at a constant rate, all you need to do is multiply 5 by 10 million

8 0
2 years ago
Simplify (1 − cos x)(1 + cos x).<br><br> 1<br> cos2 x<br> sin2 x<br> tan2 x
Phoenix [80]
Answer

The expression is equivalent to sin^{2}x

The first step is to multiply the two expressions between parentheses :
(II)
There is a trigonometric identity that states :

Working with this expression :
⇒
(I)
Using the equation (I) in (II) :
⇒


Read more on Brainly.com - brainly.com/question/3907632#readmore
3 0
3 years ago
Find the quadratic function y=​f(x) whose graph has a vertex ​(−3​,4​) and passes through the point ​(−7​,0). Write the function
olganol [36]

Answer:

Step-by-step explanation:

This is a parabola since a quadratic is a parabola.  The standard form for a parabola is y = ax² + bx + c

but before we do that, we will use the vertex form, since it will make our work easier at the beginning.  

First and foremost, when we plot the vertex and the given point, the vertex is higher up than is the point; that means that this parabola opens upside down, and its vertex form will be

y=-|a|(x - h)² + k

The absolute value is out in front of the a, so we know that the value of a is positive, but the quadratic itself is negative (upside down) and we will find that math takes care of that negative that needs to be out front.  So we need to solve for a by filling in the x, y, h, and k values from the point and the vertex:  x = -7, y = 0, h = -3, k = 4

0 = a(-7 - (-3))² + 4 and

0 = a(-7 + 3)² + 4 and

0 = a(-4)² + 4 and

0 = a(16) + 4 and

0 = 16a + 4 and

-4 = 16a so

a=-\frac{1}{4}

Now that we know a, we can plug it back into the vertex form and then put it into standard form from there.

y=-\frac{1}{4}(x+3)^2+4

Now we will FOIL out what's inside the parenthesis to get

y=-\frac{1}{4}(x^2+6x+9)+4

Simplify by distributing the -1/4 into the parenthesis:

y=-\frac{1}{4}x^2-\frac{3}{2}x-\frac{9}{4}+4

Combine like terms to get

y=-\frac{1}{4}x^2-\frac{3}{2}x+\frac{7}{4}

And there you go!

5 0
3 years ago
A 13?-foot board is cut into two pieces. The longer piece is 7.5 feet longer than the shorter piece. What is the length of each?
chubhunter [2.5K]

Answer:

The smaller board would be 2.75 feet and the longer one would be 10.25 feet.

Step-by-step explanation:

In order to find this, assume the shorter board is equal to x. Next, we would know that the longer board would be equal to x + 7.5. Using these two assumptions, we can add the lengths together, set equal to 13 and then solve for x.

x + (x + 7.5) = 13

2x + 7.5 = 13

2x = 5.5

x = 2.75

Now that we have the length of the shorter board, we can add 7.5 to it to get the larger one.

2.75 + 7.5 = 10.25

6 0
3 years ago
Other questions:
  • Which expression is equivalent to ^5√32x^5y^10z^15
    14·2 answers
  • The points (3, 24) and (7, 56) represent points of a function where y, the number of photographs, varies directly with x, th
    8·2 answers
  • If JK=20-x^2, KL=2-x, and JL=10 find x
    10·1 answer
  • Explain How can you describe a proportional relationship with a number?<br><br> NO TROLL ANSWERS!!
    15·2 answers
  • A line passes through the points (1, 4) and (3, –4). Which is the equation of the line?
    11·2 answers
  • There are two cylinders.
    13·1 answer
  • A floor 3.2m long and 2.8 m wide is to be covered with square shaped tiles of length 10cm. Find the coast of flooring if the coa
    5·1 answer
  • I need help sorry about the pic but pls try to help thank you
    11·1 answer
  • Find the slope of the line
    7·1 answer
  • using the given quadratic function f(x)=x^2+2x-15, find the following information"Coordinates of y- intercept as an ordered pair
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!