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4 years ago

Round 84,978 to the nearest ten thousand

Mathematics

2 answers:

o-na [289]4 years ago

7 0

Hello!

Our ten thousands place is an 8. If we look to the next place value, the thousands, we have 4. We need at least a 5-9 to round up. Therefore, our 8 remains the same, while all of the other numbers become 0's.

80,000 is your answer.

I hope this helps!

kvasek [131]4 years ago

6 0

85,000 is the answer

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A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall: $23.71,$17.79,$29.87,$18.78,$2

wolverine [178]

Answer:

(16.904 ; 30.660)

Step-by-step explanation:

Given the data :

X = 23.71,17.79,29.87,18.78,28.76

Sample size = 5

Mean = (23.71+17.79+29.87+18.78,+28.76) / 5 = 23.782

Using a calculator, sample standard deviation :

Standard deviation, s = 5.54

Tcritical at α = 0.05, df = 5 - 1 = 4

Using tables ; Tcritical value = 2.7763

Confidence interval :

Mean ± Margin of Error

Margin of Error (MOE) = Tcritical * SE

Margin of Error = Tcritical * s/sqrt (n)

MOE = 2.7763 * 5.54/Sqrt(5) = 6.878

Confidence interval : 23.782 ± 6.878

Lower boundary : 23.782 - 6.878 = 16.904

Upper boundary = 23.782 + 6.878 = 30.66

(16.904 ; 30.660)

7 0

3 years ago

How does square root of 48 get to 4 times the square root of 3?

serg [7]

$\sqrt{48}=\sqrt{16\times 3}=\sqrt{16}\times\sqrt{3}= 4\sqrt{3}$

When 48 is factored, it factors to 4²×3. When you take the square root of that, you get 4√3.

4 0

3 years ago

Um litro de suco é dividido entre três amigos. O primeiro fica com 14 do todo, o segundo fica com 1/3 do total e o terceiro fica

kkurt [141]

Answer:

a) 1/24 do total

Step-by-step explanation:

We have that:

The total is 1.

The first friend gets 1/4 of the total.

The second friend gets 1/3 of the total

The third friend gets 3/8 of the total.

The remaining is x.

$\frac{1}{4} + \frac{1}{3} + \frac{3}{8} + x = 1$

The least common multiple between 4, 3 and 8 is 24. So

$\frac{6 + 8 + 3*3 + 24x}{24} = 1$

$23 + 24x = 24$

$24x = 1$

$x = \frac{1}{24}$

So the correct answer is:

a) 1/24 do total

3 0

3 years ago

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Ksivusya [100]

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