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Snowcat [4.5K]
3 years ago
15

A survey asked 40 people if they were concerned about the environment - 6 said that they were very concerned. Which of the follo

wing statements correctly describes how the confidence interval for the population proportion of people that are very concerned about the environment should be computed?
Mathematics
1 answer:
LenaWriter [7]3 years ago
5 0

Answer:

There are not 15 failures and 15 successes. A confidence interval can be computed by adding  2 failures and 2 successes .

Step-by-step explanation:

Given that

Survey asked by 40 people

6 said that they were very concerned.

So the following statements correctly describe the above problem

The correct statement is , There are not 15 failures and 15 successes. A confidence interval can be computed by adding  2 failures and 2 successes .

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R varies directly as s. Find r when s=4 and k=2
lesya692 [45]
\bf \begin{array}{cccccclllll}
\textit{something}&&\textit{varies directly to}&&\textit{something else}\\ \quad \\
\textit{something}&=&{{ \textit{some value}}}&\cdot &\textit{something else}\\ \quad \\
y&=&{{ k}}&\cdot&x
\\
&&  y={{ k }}x
\end{array}\\\\
-------------------------------\\\\
thus\implies r=ks\qquad 
\begin{cases}
k=2\\
\uparrow \\
constant\ of\\
variation\\
s=4
\end{cases}\implies r=2\cdot 4
5 0
3 years ago
..................................
zhannawk [14.2K]
<h3>We know that :</h3>
  • a = 6
  • b = 2
  • h = 3

<h3>Asked :</h3>

A = …?

<h3>Solution :</h3>

A = ½ (a + b) × h

A = ½ (6 + 2) × 3

A = ½ (8) × 3

A = 4 × 3

A = <u>12</u> square units.

6 0
3 years ago
4. What is the slope of the graph of x – 2y = 8?
Liula [17]

Answer:

The slope is 1/2

Step-by-step explanation:

Use the slope-intercept form  y  =  m x + b  to find the slope  m

Hope this helps:)

6 0
3 years ago
A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 6% vinegar, and the second brand co
Jobisdone [24]

184 milliliters of the first brand and 46 milliliters of the second brand

Step-by-step explanation:

Step 1:

Let x be the number of milliliters of the first brand in the final mixture

Since the chef requires 230 milliliters, 230 - x would be the milliliters of dressing of the second brand

Step 2:

The first brand contains 6% vinegar, and the second brand contains 11% vinegar

Hence we have,

x * 6/100 + (230-x) * 11/100 = 230 * 7/100

0.06 x + 25.3 - 0.11 x = 16.1

0.05x = 9.2 => x = 184

Hence the 184 milliliters of the first brand is to be used

Step 3 :

Quantity of the second brand to be used is 230 - x = 230 -184 = 46 milliliters.  

8 0
4 years ago
Help me please 2t = 10
Black_prince [1.1K]
Divide both sides by 2

2t/2 = 10/2


t=5
8 0
3 years ago
Read 2 more answers
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