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3 years ago

PLSS Help I'm desperate

Mathematics

2 answers:

lora16 [44]3 years ago

8 0

Answer:

so the answer should 20 because

if you divide 20/4 you would get 5

so basically all you are looking for is what number times what = that number

Step-by-step explanation:

Ainat [17]3 years ago

7 0

Answer:

20 -> 5

Step-by-step explanation:

20 / 4 = 5

40 -> 10

160 -> 40

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Please help me with this question.

elixir [45]

You will see a tiny picture up top of the question and draw it out and added then work

8 0

3 years ago

The article "Occurrence and Distribution of Ammonium in Iowa Groundwater" (K. Schilling, Water Environment Research, 2002:177–18

Papessa [141]

Answer: 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

Step-by-step explanation:

Since we have given that

Number of alluvial wells = 349

Number of quaternary wells = 143

Number of alluvial wells that had concentrations above 0.1 = 182

Number of quaternary wells that had concentrations above 0.1 = 112

Average of alluvial wells = 0.27

Standard deviation = 0.4

Average of quaternary wells = 1.62

Standard deviation =1.70

So, 95% confidence interval gives

alpha = 5% level of significance.

$\dfrac{\alpha}{2}=2.5\%\\\\z_{\frac{\alpha}{2}}=1.96$

So, 95% confidence interval becomes,

$(1.62-0.27)\pm 1.96\sqrt{\dfrac{0.4^2}{349}+\dfrac{1.7^2}{143}}\\\\=1.35\pm 1.96\times 0.020\\\\=(1.35-0.040,1.35+0.040)\\\\=(1.31,1.39)$

Hence, 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

6 0

3 years ago

Uh yeah I need help can someone please explain to me please and thank you :)

Rzqust [24]

Answer:

53/36

Step-by-step explanation:

56/36 is already in it's simplest form

6 0

3 years ago

Read 2 more answers

If h(x) =6 -x, what is the value of (h•h)(10)

Brrunno [24]

Answer:

Your exact value should be 10h $^{2}$

Step-by-step explanation:

I put it into the calculator and that's what came out.

8 0

3 years ago

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Consider the conditional statement shown.

Snowcat [4.5K]

Hello!

First of all, 6 and 10 are not prime numbers as they both have at least two pairs of factors (one factor pair plus one and itself).

Anything multiplied by two is even. Therefore, a) 2 counterexamples the statement. Just to show why 7 doesn't work, seven multiplied by 3 is 21, which is odd, and 7 times 7 is 49, and 7 times 5 is 35 (all prime multipliers). The only one that works is two.

I hope this helps!

6 0

3 years ago

Read 2 more answers