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erma4kov [3.2K]
3 years ago
12

To determine what apartment renters want, the manager randomly surveyed eight renters in each of the six buildings in the comple

x. Our of 48 renters, 64% said they would like more hallway lights. The manager concludes that about two thirds of all the renters would like more hallway lights. Is this conclusion valid? Justify
Mathematics
1 answer:
Zina [86]3 years ago
4 0
Two thirds is equal to 66.666666 etc. percent so 64 is pretty close to 66 so I would consider it right.
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.0066% converted to decimal is:
Neporo4naja [7]

Answer:

Step-by-step explanation:kk

.0066%

To convert Decimal to fraction you first remove the % sign and divide by 100

.0066

_____ =0.00066

100  

4 0
3 years ago
Read 2 more answers
Lisa had $7.33. She then bought a pen for $1.14.<br> How much money does she have left?
jarptica [38.1K]

Answer:

Step-by-step explanation:

7.73 - 1.14 is equal to 6.59 dollars

5 0
3 years ago
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From $16 to $4 percent
Vlad1618 [11]

Answer:

Im sorry but thats not a proper question

Step-by-step explanation:

4 0
3 years ago
Graph the function y = 2x3 – x2 – 4x + 5. To the nearest tenth, over which interval is the function decreasing?
daser333 [38]
As you progress in math, it will become increasingly important that you know how to express exponentiation properly.

y = 2x3 – x2 – 4x + 5  should be written    <span>y = 2^x3 – x^2 – 4^x + 5.  The 
" ^ " symbol denotes exponentiation.

I see you're apparently in middle school.  Is that so?  If so, are you taking calculus already?  If so, nice!

Case 1:  You do not yet know calculus and have not differentiated or found critical values.  Sketch the function          </span>y = 2x^3 – x^2 – 4^x + 5, including the y-intercept at (0,5).  Can you identify the intervals on which the graph appears to be increasing and those on which it appears to be decreasing?

Case 2:  You do know differentiation, critical values and the first derivative test.  Differentiate  y = 2x^3 – x^2 – 4^x + 5 and set the derivative = to 0:

dy/dx = 6x^2 - 2x - 4 = 0.  Reduce this by dividing all terms by 2:

dy/dx = 3x^2 - x - 2 = 0    I used synthetic div. to determine that one root is x = 2/3.  Try it yourself.  This leaves the coefficients of the other factor, (3x+3); this other factor is x = 3/(-3) = -1.  Again, you should check this.

Now we have 2 roots:  -1 and 2/3

Draw a number line.  Locate the origin (0,0).  Plot the points (-1, 0) and (2/3, 0).  This subdivides the number line into 3 subintervals:

(-infinity, -1), (-1, 2/3) and (2/3, infinity).

Choose a test number from each interval and subst. it for x in the derivative formula above.  If the derivative comes out +, the function is increasing on that interval; if -, the function is decreasing.

Ask all the questions you want, if this explanation is not sufficiently clear.

4 0
3 years ago
Read 2 more answers
Simplify x^3 y^3 / x^3 y^3
Marysya12 [62]

Answer:

\frac{1}{y}

Step-by-step explanation:

When simplifying an exponent a way to do is to expand the exponent. This means that it will now be

\frac{x*x*x*y*y*y}{x*x*x*y*y}

Whenever you see an x or y on the numerator and denominator cross it out because it is the same thing as 1

When you cross out all of the x's and y's the only variable left is y in the denominator. This means that the answer is \frac{1}{y}

5 0
3 years ago
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