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3 years ago

13

What is 380.5 rounded to the nearest whole number

2 answers:

Lisa [10]3 years ago

8 0

Answer:

It will be 381. You round up if it is five and over, and round down if 5 and below.

Step-by-step explanation:

A decimal cannot be a whole number so rounding to the nearest whole number means getting rid of the decimal. You do this by rounding up if it 5 and up, and rounding down if it is 5 and below. 380.5 means you would round up to 381. If it it were 380.4, you would round down to 380.

pishuonlain [190]3 years ago

3 0

Answer:

381

Step-by-step explanation:

any number 5 and over will round up

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34 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 25.9 pounds and a

Vlad1618 [11]

Answer:

24.6 < μ < 27.2

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96\frac{3.8}{\sqrt{34}} = 1.3$

The lower end of the interval is the sample mean subtracted by M. So it is 25.9 - 1.3 = 24.6 pounds.

The upper end of the interval is the sample mean added to M. So it is 25.9 + 1.3 = 27.2 pounds.

So the correct answer is:

24.6 < μ < 27.2

4 0

3 years ago

Mrs. Rullo has four times as many pens as Mrs. virola. they have a total of 40 pens. How many more pens does Mrs.Rullo have then

IgorLugansk [536]

x + 4x = 40

5x = 40

x = 8

Mrs. Viola has 8 and Mrs. Rullo has 4*8=32 pens.

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3 years ago

Read 2 more answers

Find the missing angles in the parallelogram.

algol [13]

Answer:

85, 95, 95

Step-by-step explanation:

A = 85

B = 95

C = 95

I hope this helped!

7 0

3 years ago

If 3x + 6 = 18, then x = ?

zaharov [31]

Answer:

X=4

Step-by-step explanation:

$3x + 6 = 18 \\ 3x = 18 - 6 \\ 3x = 12 \\ x = 4$

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3 years ago

What is the exact value of x? 5⋅21^5x=16

IRINA_888 [86]

Answer:

x= 16 /20420505

Step-by-step explanation:

Let's solve your equation step-by-step.

5(215)x=16

Step 1: Simplify both sides of the equation.

20420505x=16

Step 2: Divide both sides by 20420505.

20420505x /20420505 = 16 /20420505

x= 16 /20420505

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2 years ago