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3 years ago

Stuck in it from a week!! Help please.

Mathematics

1 answer:

nadya68 [22]3 years ago

5 0

The answer is 49 because x = 1/7 and 1/7^-2 =49

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Using the graph as an aid, which statement describes a true relationship between the x-intercepts and the zeros? A) The x-interc

Genrish500 [490]

Answer: A) The x-intercepts and the zeros are the same value.

Step-by-step explanation:

because when graphing the line goes through the origin and the origin is zero.

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3 years ago

Evaluate the following 1340five minus 242five

vampirchik [111]

Answer:

10980 is the correct answer

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3 years ago

For a normal distribution with μ=500 and σ=100, what is the minimum score necessary to be in the top 60% of the distribution?

STatiana [176]

Answer:

475.

Step-by-step explanation:

We have been given that for a normal distribution with μ=500 and σ=100. We are asked to find the minimum score that is necessary to be in the top 60% of the distribution.

We will use z-score formula and normal distribution table to solve our given problem.

$z=\frac{x-\mu}{\sigma}$

Top 60% means greater than 40%.

Let us find z-score corresponding to normal score to 40% or 0.40.

Using normal distribution table, we got a z-score of $-0.25$ .

Upon substituting our given values in z-score formula, we will get:

$-0.25=\frac{x-500}{100}$

$-0.25*100=\frac{x-500}{100}*100$

$-25=x-500$

$-25+500=x-500+500$

$x=475$

Therefore, the minimum score necessary to be in the top 60% of the distribution is 475.

3 0

3 years ago

A bookstore sells textbooks for $80 each and notebooks for $4 dollars each. The bookstore would like to sell $800 in merchandise

mariarad [96]

Answer: 8 textbooks

Step-by-step explanation:

Sold 40 notebooks = 40 x $4 = $160

$800 - $160 = $640 left to sell

$640/$80 (cost of textbook) = 8 textbooks need to be sold

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3 years ago

In 2000, the population of a state was approximately 659 thousand. If the population decreased by 0.8% between 200 and 2009, fin

Aleks04 [339]

Answer:

613297

Step-by-step explanation:

The equation for exponential decay is y=A(1-r)^t

A=654,000

r (rate)=0.008 (0.8% as a decimal)

t=8 (2009-2000=8)

y=659,000(1-0.008)^8

y=613297.4028

Since you can't have part of a person, round: y=613297

3 0

3 years ago