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3 years ago

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Naomi buys last year's best-selling novel, in hardcover, for $16.50 $ ⁢ 16.50 . This is with a 25% 25 % discount from the origin

al price. What was the original price of the novel?

1 answer:

andrew11 [14]3 years ago

6 0

The answer should be 22 dollars

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what key feature(s) can be easily identified from factored form? explain how each key feature is related to the roller coaster.

Ulleksa [173]

Answer:

Step-by-step explanation:

With a factor of (t - 1) we know that zero (ground level) is reached at 1 second from an initial height of (0 - 1)(0 - 1)(0 - 11)(0 - 13)/3 = -1•-1•-11•-13 / 3 = 47⅔ meters at t = 0

As we have <em>two </em>factors of (t - 1) we know the track does not go underground at t = 1, but rises again.

At t = 11 seconds, the car has again returned to ground level, but as we only have a single factor of (t - 11) the car plunges below ground level and returns to above ground level at t = 13 seconds due to the single factor of (t - 13)

we can estimate that the car is the deepest below ground level halfway between 11 and 13 s, so at t = 12. At that time, the depth will be about (12 - 1)(12 - 1)(12 - 11)(12 - 13) / 3 = -(11²/3) = - 40⅓ m.

we can estimate that the car is the highest above ground level halfway between 1 and 11 s, so at t = 6s. At that time, the height will be about (6 - 1)(6 - 1)(6 - 11)(6 - 13) / 3 = 5²•-5•-7 / 3 = 291⅔ m.

It's obvious that the roller coaster car had significant initial velocity at t = 0 to achieve that altitude from an initial height of 47⅔ m

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3 years ago

Which of the following could be the equation of a line parallel to the line y=-4x+1

saveliy_v [14]

It would be D.
Because the slope is the same but the yint is different

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3 years ago

Read 2 more answers

a study of 20 worldwide financial institutions showed the correlation between their assets and pretax profit to be 0.86. 1. stat

Gre4nikov [31]

The decision rule is reject H(0) if t>1.714, test statistic t is 7.157 and Yes, we can conclude that the correlation in the population is greater than zero.

In the given question,

A study of 20 worldwide financial institutions showed the correlation between their assets and pretax profit to be 0.86.

n=20, r = 0.86

The decision rule for α=0.05 significance level:

H(0): P ≤ 0

H(1): P > 0

Degree of freedom(df) = n-2

Degree of freedom(df) = 20-2

Degree of freedom(df) = 18

This is the right tailed test using the t table.

Critical Value: $t_{\alpha /2}$ , df = $t_{\alpha /2}$ = 1.714

(a) The decision rule is reject H(0) if t>1.714.

(b) Test statistic is t

t= r√(n−2)/√(1–r^2)

t= 0.86*√(20 -2)/√(1-(0.86)^2)

t= 0.86*√18/√(1-0.7396)

t= 0.86*4.243/√0.2604

t= 3.65/0.51

t= 7.157

Test statistic = 7.157

(c) We have to conclude that the correlation in the population is greater than zero.

Yes, we can conclude that the correlation in the population is greater than zero.

To learn more about test statistic z link is here

brainly.com/question/3006526

#SPJ4

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2 years ago

From 1999 to 2008, the United States Mint

Naddik [55]

Answer:

B because not only are we talking about two states, but out of the amount given they was more likely seen.

4 0

3 years ago

The Red Cross regularly conducts Blood Drives throughout the country. They often conduct emergency drives when they are in need

faust18 [17]

Answer:

The probability is $P( X \ge 2) = 0.986$

Step-by-step explanation:

From the question we are told that

The proportion people with Blood type AB-negative in the world is p = 0.006

The sample size is n = 30

Generally the distribution of people with Blood type AB-negative follows a binomial distribution

i.e

$X \~ \ \ \ B(n , p)$

and the probability distribution function for binomial distribution is

$P(X = x) = ^{n}C_x * p^x * (1- p)^{n-x}$

Here C stands for combination hence we are going to be making use of the combination function in our calculators

Generally the probability that at least 2 of them have blood type AB-negative is mathematically represented as

$P( X \ge 2) = 1 - P( X < 2 )$

$P( X \ge 2) = 1 - [P( X = 0 ) + P( X = 1 ) ]$

=> $P( X \ge 2) = 1 - [1 * 1 * 0.8348 ] + [30 * 0.006 * 0.83986 ]$

=> $P( X \ge 2) = 0.986$

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3 years ago