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3 years ago

Help ples in class right now please hellp

Mathematics

1 answer:

WARRIOR [948]3 years ago

5 0

Answer:

i believe it is 25 for ginny

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brainly is acting weird for me, loading very slowly to not at all and just getting error 404 message sometimes. searching is bro

Lelu [443]

Same for me it won’t let me pick a certain topic

7 0

3 years ago

Simplify. (3 + 2) + (4 + 3) =

Gala2k [10]

Answer:

5 + 7

Step-by-step explanation:

3 + 2 = 5, 4 + 3 = 7

5 0

3 years ago

Read 2 more answers

Fill in the blanks below in order to justify whether or not the mapping shown represents a function

Anni [7]

Answer:

This is a function

Step-by-step explanation:

What does it say for the next arrows

7 0

3 years ago

A Ferris wheel has a diameter of 56 ft. how far will a rider travel during a 4-minute ride if the wheel rotates once every 20 se

Luba_88 [7]

First calculate the circumference. Usually this is the diameter times pi, but since we are told to estimate pi, the circumference equals 56 * 22/7 or 176 feet.
In 4 minutes, 4 * 60 = 240 seconds pass. In this time, a 20 second period will occur 240/20 = 12 times.
So we know that the rider rotates 12 times and each rotation takes them 176 feet, meaning that they will travel 12 * 176 = 2112 feet

5 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