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2 years ago

The fastest elevators in the Burj Khalifa can travel 330 feet in just 10 seconds.

Mathematics

2 answers:

DaniilM [7]2 years ago

6 0

Answer:

The elevator will travel 363 feet in 11 seconds.

Step-by-step explanation:

To get this answer, first we need to figure out how fast the elevator can travel in one second.

Since we know that it can travel 330 feet in 10 seconds, we can use the equation : 330 ÷ 10 = 33

Now we know that in 1 second, the elevator can travel 33 feet.

Lastly, we multiply 11 seconds by 33 feet to get 363 feet.

Hope this helps:) Goodluck!

OLga [1]2 years ago

3 0

Answer:

363 ft

Step-by-step explanation:

We can use a ratio to solve

330ft x ft

------------ = ---------------

10 seconds 11 seconds

Using cross products

330*11 = 10x

Divide by 10

330*11/10 = x

363 = x

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The heights of the trees for sale at two nurseries are shown below. Heights of trees at Yard Works in feet : 7, 9, 7, 12, 5 Heig

Troyanec [42]

Answer:

The mean of tree heights at Yard Works is 8 feet and at Grow Station is 9 feet.The mean absolute deviation of the tree heights at both yards is 2.

Step-by-step explanation:

1). Height of the trees at Yard Works are = 7,9,7,12,5 feet

So mean height of the trees = (7+9+7+12+5)÷5

= 40÷5 =8 feet

Standard deviation of the trees at Yard works = ∑(║(height of the tree-mean height of the tree))║/(number of trees)

(height of the tree-mean height of the tree)= ║(7-8)║+║(9-8)║+║(7-8)║+║(12-8)║+║(5-8)║ = (1)+1+(1)+4+(3)= 10

Therefore standard deviation = (10)/(5) =2

2). In the same way mean height of the trees at Grow Station=(9+11+6+12+7)/5= 45/5 = 9

Now we will calculate the mean deviation of the tress at Grow Station

= ∑║(height of the tree-mean height of the tree)║/(number of trees)

= ║(9-9)║+║(11-9)║+║(6-9)║+║(12-9)║+║(7-9)║/(5)

= (0+2+3+3+2)/5

= 10/5 =2

Therefore The mean of tree heights at Yard Works is 8 feet and at Grow Station is 9 feet.The mean absolute deviation of the tree heights at both yards is 2.

7 0

4 years ago

Read 2 more answers

What is the inverse of the function f(x)=-x?

svp [43]

To find the inverse we have to first change the function notation to 'y'

So

f(x) = -x becomes y = -x

Next, we have to switch the x and y values

So, y = -x becomes x = -y

Now, we have to solve for y.

y = -x

So the inverse of f(x) = -x is:

$f^{-1}(x) = -x$

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3 years ago

John can cut 3 yards of grass per day if he works seven days how many yards can he cut in a week

Solnce55 [7]

Answer:

Step-by-step explanation:

Since there are 7 days in a week, we'll multiply 3 by 7, resulting in an answer of: 21.

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3 years ago

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lara [203]

Answer:

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Step-by-step explanation:

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