As an estimation we are told £3 is €4. Convert €32 to pounds.

You have used the significant level of 0.01 to estimate the average hours of television viewing for the NJ students. What is the

Lorico [155]

Answer:

1%

Step-by-step explanation:

Given : You have used the significant level of 0.01 to estimate the average hours of television viewing for the NJ students.

To Find :What is the chance that our interval estimate does not contain the true population mean?

Solution:

We are given that You have used the significant level of 0.01 to estimate the average hours of television viewing for the NJ students.

So, α=0.01

Significance level indicates a risk of concluding that a difference exists when there is no actual difference.

So, The chance that our interval estimate does not contain the true population mean is 0.01

So, The chance that our interval estimate does not contain the true population mean is $0.01 \times 100 = 1\%$

Hence Option D is true

8 0

4 years ago

A fireplace arch is to be constructed in the form of a semiellipse. The opening is to have a height of 3 feet at the center and

USPshnik [31]

Answer:

Step-by-step explanation:

Given

Fireplace is in the form of semi-ellipse with height of 3 ft from center

Length of base=8 ft

if the arch is in the form of ellipse then it can be considered as horizontal ellipse with 2 a and 2 b be length of major and minor axis

2 a =8

a=4 ft

If contractor cover the whole base

then total length of string=2a =8 ft

(b)String should be nailed at focus

focus of ellipse is a e

where e=eccentricity

$e=\sqrt{1-(\frac{b}{a})^2}$

$e=\sqrt{1-(\frac{3}{4})^2}=\frac{\sqrt{7}}{4}$

Focus $=ae =\sqrt{7}$

Thus string should be nailed at 2.64 m from center

8 0

4 years ago

For (triangle)DEF, you are required to construct the median DG to EF. Which of the following must be performed first?

iren2701 [21]

Answer: C. Bisect DE at G.

Step-by-step explanation:

In a triangle, a median is a line segment drawn from a vertex to the midpoint of the opposite side of the vertex.

So, for triangle DEF , if we draw the median DG to the opposite side EF.

Here EF is the opposite side to vertex D.

So, G must be the midpoint of line segment EF.

So , we need to first mark G on EF.

i.e. we need to bisect EF at G.

So first step would be : Bisect EF at G.

8 0

3 years ago

What is the value of X? 80 cm 20 cm 12 cm 10 cm

dangina [55]

Answer:

$x=12cm$

Step-by-step explanation:

Triangle DEF is similar to triangle HGF.

Therefore the corresponding sides are proportional.

We can write the following equations for the corresponding sides.

$\frac{DF}{HF}=\frac{EF}{GF}$

This implies that,

$\frac{16+40}{40}=\frac{x+30}{30}$

This gives us,

$\frac{7}{5}=\frac{x+30}{30}$

We cross multiply to get,

$7\times 30=5(x+30)$

We divide through by 5 to get,

$7\times 6=(x+30)$

We multiply to get,

$\Rightarrow 42=x+30$

Grouping like terms gives,

$\Rightarrow 42-30=x$

We simplify to obtain,

$\therefore x=12cm$

The correct answer is C

6 0

3 years ago

Read 2 more answers

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love history [14]

Answer:

mood

Step-by-step explanation:

6 0

3 years ago