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2 years ago

Help a random guy of the internet...that sounds weird

Mathematics

1 answer:

Katarina [22]2 years ago

4 0

Answer:

I think 1 is yr answer

hope it helps.

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Help! I'll give 30 points!!!!!!

son4ous [18]

Answer:

Step-by-step explanation:

The plotted points do not follow a general direction and therefore have no correlation

7 0

2 years ago

A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

Lelu [443]

Answer:

95% Confidence interval: (0.375,0.377)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 0.376 cc/cubic meter

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation, s = 0.0012

Degree of freedom =

$=n-1\\=15-1\\=14$

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.145$

$0.376 \pm 2.145(\dfrac{0.0012}{\sqrt{15}} )\\\\ = 0.376 \pm 0.0006\\\\ = (0.3754,0.3766)\approx (0.375,0.377)$

(0.375,0.377) is the required 95% confidence interval for the population mean potassium chloride concentration.

5 0

2 years ago

Help plz I really need to pass

Tresset [83]

Answer:

2.56

Step-by-step explanation:

The equation they dive u: d = 16t^2, so in the question they said what's the distance, d, if t = 0.4

So you just have to replace t with 0.4:

d = 16t^2

d = 16(0.4)^2

d = 16(0.16)

d = 2.56

3 0

2 years ago

A surveyor in a canyon takes measurements and draws the diagram shown.

Fiesta28 [93]

Answer:

$\approx 118.4$

Step-by-step explanation:

We know two sides and the angle between the sides, so we can use the Law of Cosines. Recall that the Law of Cosines states that:

$c^2=a^2+b^2-2abcos(C)$ , where a and b are the sides and C is the angle in between.

Let's substitute 115 for a, 178 for b, and 41 for Angle C.

Thus:

$c^2=115^2+178^2-2(115)(178)cos(41)$

$c^2=44909-40940cos(41)$

$c=\sqrt{44909-40940cos(41)}$

$c \approx 118. 4$

5 0

2 years ago

What is the volume, in cubic cm, of a cylinder with a height of 11cm and a base radius

never [62]

Answer:

Step-by-step explanation:

I’m not good at round but the answer without the rounding is 2799.16

7 0

2 years ago

Read 2 more answers