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2 years ago

A student thinks that the regular pentagon in the diagram

Mathematics

1 answer:

Nadya [2.5K]2 years ago

4 0

Answer:

Step-by-step explanation:

The student must have thought that every single arrowhead is a line of symmetry, so since there are 10 arrowheads, there must be 10 lines of symmetry. This is incorrect because if you look closely at the diagram, each line has 2 arrowheads, so the student is overcounting by a factor of 2. They should have just counted the number of lines, not arrowheads. Therefore, there must be 10/2 = 5 lines of symmetry, not 10. Hope this helps!

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A manufacturer of pacemakers wants the standard deviation of the lifetimes of the batteries to be less than 1.8 months. A sample

kodGreya [7K]

Answer:

Look down my answer↓:

Step-by-step explanation:

3 0

1 year ago

(b) About how many times larger was the population of the United States than the population of Columbus, Ohio? Show your work! N

padilas [110]

Answer:

The population of the United States is 387.87 times larger than the population of Columbus, Ohio.

Step-by-step explanation:

8.25 times 10^5 = 825,000

3.2 times 10^8 = 320,000,000

320,000,000 divided by 825,000 = 387.87

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3 years ago

For a confidence level of 85%, find the critical value for a normally distributed variable. The sample mean is normally distribu

const2013 [10]

Answer:

The value is $Z_{\alpha } = 1.439$

Step-by-step explanation:

From the question we are told that

The confidence level is C = 85%

Generally the level of significance is mathematically represented as

$\alpha = (100 - 85 )\%$

$\alpha = 0.15$

Now from the normal distribution table the critical value of $\alpha$ is

$Z_{\alpha } = 1.439$

7 0

3 years ago

3+3+3+3+3+3+3+333333

GREYUIT [131]

Answer:

333354

Step-by-step explanation:

Simplify the expression.

3 0

3 years ago

Read 2 more answers

Somebody please help me with my geometry.

eduard

Answer:

In order to read the degrees of an angle with a protractor, you must first determine if the angle is acute or obtuse. If it is acute, you use the measurement of the smaller number on the protractor. If it is obtuse, you use the larger measurement on the protractor.

For example, the measurement of the angle in question 1 seems to be about 74 degrees.

4 0

2 years ago