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Brut [27]
3 years ago
6

An elevator starts on the 100th floor. It descends 4 floors every 10 seconds. At what floor will the elevator be 60 seconds afte

r it starts?
Mathematics
2 answers:
Artyom0805 [142]3 years ago
8 0
So is 4 floors / 10 seconds
If you have 60 seconds you can multiple 10 by 6 because 10×6=60
so you also have to multiple 4 by 6
4×6=24
and because it's descending it's 100-24= 76
larisa [96]3 years ago
4 0
It would be at the 76th floor because 10 seconds times 6 seconds is equivalent to 60 seconds. So you would also multiply the 4 floors by 6 to get 24. You would finally subtract 100 an 24 to get the 76th floor. Hopes this makes sense, and I hoped this helped!
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The locus of points idea allows you to define a circle without giving a numerical value for the radius?
Lunna [17]

<span>The answer would be yes, the locus of points idea allows you to define a circle without giving a numerical value for the radius.

A locus of points</span> is the set of <span>points<span>, and only those </span>points</span>, that satisfies given conditions. The locus of points at a given distance from a given point is a circle whose center is the given point<span> and whose radius is the given distance.</span>

4 0
4 years ago
Read 2 more answers
EF is a median of trapezoid ABCD. what is the value of x?
goldfiish [28.3K]
Since the given figure is a trapezoid, here is how we are going to find for the value of x. Firstly, the sum of the bases of the trapezoid is always equal to twice of the median. So it would look like this. 2M = A + B.
Plug in the given values above.
2M = (<span>3x+1) + (7x+1)
2(10) = 10x + 2
20 = 10x + 2
20 - 2 = 10x
18 = 10x < divide both sides by 10 and we get,
1.8 = x
Therefore, the value of x in the given trapezoid is 1.8. Hope this is the answer that you are looking for. 

</span>
8 0
3 years ago
A rectangle initially has dimensions 3 cm by 6 cm. All sides begin increasing in length at a rate of 3 cm divided by s 3 cm/s. A
Setler [38]

Answer:

  405 cm²/s

Step-by-step explanation:

The dimensions are increasing at the rate of 3 cm/s, so the dimensions in cm can be described as a function of time by ...

  3 + 3t

and

  6 + 3t

Then the area is the product of these, or ...

  A = (3 +3t)(6 +3t)

  A = 9t² +27t +18

and the rate of change of area is given by its derivative with respect to t:

  A' = 18t +27

When t=21, the value of this is ...

  A'(21) = 18·21 +27 = 405 . . . . cm²/s

3 0
3 years ago
Please help me! this got deleted at first for some reason ​
Dmitrij [34]

Answer: 55 Square inches

Step-by-step explanation:

You should find the area of the square and rectangle separately

To find the area you multiply length times width, so the area of the square is 4×4 which equals 16

Then you do the same to the rectangle, 13×3=39

To find the area of the whole figure you add the area of the two shapes together 16+39 which should give you 55

3 0
3 years ago
Read 2 more answers
a taxi charges an initial fee of $1.50 plus $1.50 for every mile traveled.A taxi ride coast $21.00 how many miles did the taxi t
Lapatulllka [165]
Let x equal miles traveled<span>2.25+0.75(x-1/2)/(1/8)=12
2.25+.75(x-1/2)*8=12
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6x-.75=12
6x=12.75n
x=12.75/6=2.125 or 2+1/8 miles </span>
8 0
3 years ago
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