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4 years ago

Round each decimal to the nearest whole number 30.92

Mathematics

1 answer:

Serhud [2]4 years ago

5 0

It would be 31. 31 is a whole number. since 0.91 is close to 1. We would round it to 31 because of that.

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The lifetime of a certain brand of battery is known to have a standard deviation of 9 hours. Suppose that a random sample of 90

Rina8888 [55]

Answer:

lower limit : 36.44

upper limit : 39.56

Step-by-step explanation:

Given :

s = 9

n = 90

x = 38.9

Alpha, α = 0.10

∴ $z_{\alpha/2}=z_{0.05} = 1.645$

The confidence interval is :

$=x \pm\left(z_{\alpha /2} \times \frac{s}{\sqrt{n}}\right)$

$=38.9 \pm\left(1.645 \times \frac{9}{\sqrt{90}}\right)$

$=38.9 \pm 1.56$

$=(36.44, 39.56)$

Therefore,

lower limit : 36.44

upper limit : 39.56

3 0

3 years ago

Which is most likely to weigh 2 pounds?

Leto [7]

Answer:

Insert an image.

Step-by-step explanation:

If you may, add a picture so I can see what you mean.

7 0

2 years ago

HELP FIND THE VOLUME

HACTEHA [7]

5. Volume of sphere = 4/3 x pi xr ^3

Volume = 4/3 x 3.14 x 2^3 = 33.49 cubic feet.

6 . Volume of cylinder = pi x r^2 x height

Volume = 3.14 x 2^2 x 3 = 37.68 cubic meters

8 0

3 years ago

3xy^3+5-x-2xy^3=xy^3+11

Viktor [21]

Answer: x=-6

Sorry, I am only able to find the x :(

Step-by-step explanation:

Step 1: Add -xy^3 to both sides.

$xy^3-x+5+-xy^3=xy^3=xy^3+11+-xy^3$

$-x+5=11$

Step 2: Add -5 to both sides.

$-x+5+-5=11+-5\\-x=6$

Step 3: Divide both sides by -1.

$\frac{-x}{-1} =\frac{6}{-1}$

8 0

3 years ago

Read 2 more answers

PLZ do this fast! I need to finish quick!!!!!!!! :/

Ber [7]

Answer:

1.) 5 5215/6957

2.) 300

3.)1 1/3

4.)375527728 4/5

8 0

3 years ago