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wolverine [178]

3 years ago

11

Mr. toad she'll land at 11 rulers at the beginning of class collected for rulers in the middle of class and gave out seven at th

e end of class he had 18 at the end of the day how many ballista he start with

1 answer:

Alla [95]3 years ago

4 0

I think you have to add all the numbers if im not mistaking.....hope this helped

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The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident th

Aleks04 [339]

Answer:

The minimum sample size that can be taken is of 14 dogs.

Step-by-step explanation:

The formula for calculating the minimum sample size to estimate a population mean is given by:

$n=\frac{z^{2}\sigma^{2}}{e^{2}}$

The <u>first step</u> is obtaining the values we're going to use to replace in the formula.

Since we want to be 95% confident, $1-\alpha=0.95 \Rightarrow \alpha=0.05$ .

Therefore we look for the critical value $z_{\alpha/2}=1.96$ .

Then we calculate the variance:

$\sigma = 3.7 \Rightarrow \sigma^{2}=13.69$

And we have that:

$e=2 \Rightarrow e^{2}=4$

<u>Now</u> we replace in the formula with the values we've just obtained:

$n=\frac{1.96^{2}*13.69}{4}=13.1479\approx 14$

Therefore the minimum sample size that can be taken to guarantee that the sample mean is within 2 inches of the population mean is of 14 dogs.

6 0

3 years ago

Determine the area bounded by the curves f(x) = 4x and g(x) = 3x + 1.

ANEK [815]

Answer: 12x^2+4

Step-by-step explanation:

7 0

3 years ago

Ari lives 4/5 of a mile from the park she has already walked 3/4 of the way to the park. How far has ari walked

Olin [163]

3/4 of 4/5 = 3/4 x 4/5 = 12/20 = 3/5 of a mile (= 1056 yards)

3 0

2 years ago

A container is shaped like a rectangular prism and has a volume of 72 cubic feet. Give four different set of measurements that c

dimaraw [331]

Answer:

The formula for the volume of a prism is V = Bh

where,

B is the base area

h is the height.

Since, the base of the prism is a rectangle, therefore, volume of a rectangular prism = (L * B) * h

Assumptions:

Length, L and Width, B cannot be the same.

1.

h = 4 ft

B = 2 ft

L = 9 ft

2.

h = 4 ft

B = 3 ft

L = 6 ft

3.

h = 6 ft

B = 2 ft

L = 6 ft

4.

h = 2 ft

B = 2 ft

L = 18 ft

Step-by-step explanation:

6 0

2 years ago

Y=3x<br>2y-5x=4 <br>I need the work and answer for it

telo118 [61]

U plug in the y
2 (3x) -5x=4
simplify
6x -5x =4
solve
x=4
so now you know x=4 so plug that in for x
y= 3(4)
y=12
check your answer
2(12)-5(4)=4
solve
24-20=4
4=4
so you now you got the answer right !

hope that helps!

3 0

3 years ago