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hammer [34]
3 years ago
13

the heights, in meters of some of the tallest waterfalls around the world are listed. 979,896,796,900,836,820,948,914,860,840,81

8. what is the mean, to the nearest whole number, of the heights of the waterfalls. the sum of the values is . there are total values in the data set. the mean, to the nearest whole number, is m.
Mathematics
1 answer:
lions [1.4K]3 years ago
6 0

Answer:

817

Step-by-step explanation:

First add all the numbers:

979+896+796+900+836+820+948+914+860+840+818

= 9607

Next, divide by total amount of numbers. There are 11 numbers, so:

9607/11=817.3636...

Then, round the number. The answer should be clear

Please mark brainliest

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I need help with these three problems please​
Liono4ka [1.6K]

Answer:

Q7. 11.3 inches (3 s.f.)

Q8. 96.2 ft

Q9. 36.4cm

Step-by-step explanation:

Q7. Please see attached picture for full solution.

Q8. Let the length of a side of the square be x ft.

Applying Pythagoras' Theorem,

34^{2}  =  {x}^{2}  +  {x}^{2}  \\ 2 {x}^{2}  = 1156 \\  {x}^{2}  = 1156 \div 2 \\  {x}^{2}  = 578 \\ x =  \sqrt{578}  \\

Thus, the perimeter of the square is

= 4( \sqrt{578} ) \\  = 96.2 ft\:  \:  \: (3 \: s.f.)

Q9. Equilateral triangles have 3 equal sides and each interior angle is 60°.

Since the perimeter of the equilateral triangle is 126cm,

length of each side= 126÷3 = 42 cm

The green line drawn in picture 3 is the altitude of the triangle.

Let the altitude of the triangle be x cm.

sin 60°= \frac{x}{42}

\frac{ \sqrt{3} }{2}  =  \frac{x}{42}  \\ x =  \frac{ \sqrt{3} }{2}  \times 42 \\ x = 21 \sqrt{3}  \\ x = 36.4

(to 3 s.f.)

Therefore, the length of the altitude of the triangle is 36.4cm.

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3 years ago
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The sum of partial product is not always equal to a final product

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PLS HELP !!! GIVING OUT BRAINLIEST ANSWER !! PLS HELP ASAP
never [62]

Answer:

The bottom one (D) the end it is sitting on

Step-by-step explanation:

what's there to explain xD

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3 years ago
Meagan is taking piano and gymnastics lessons. She has a piano lesson every 13 days and a gymnastics lesson every 6 days. When w
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the answer is 2

there are 13 days, 6x2=12. so the answer is 2.

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