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3 years ago

What makes a quadratic equation make sense?

1 answer:

7 0

When solving equilibrium problems a quadratic results it has the general form 0 equals x ^ 2 + BX + C a b and c may be positive or negative numbers usually when the wrong answer is plugged in it will lead to a negative concentration or amount. good luck

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The Graduate Record Examination (GRE) is a standardized test that students usually take before entering graduate school. Accordi

lesantik [10]

Answer:

(a) The first quartile is 382.27 and it means that at least el 25% of the scores are less than 382.27 points.

The second quartile is 462 and it means that at least el 50% of the scores are less than 462 points.

The third quartile is 541.73 and it means that at least el 75% of the scores are less than 541.73 points.

(b) The 99th percentile is 739.27 and it means that at least el 99% of the scores are less than 739.27 points.

Step-by-step explanation:

The first, second the third quartile are the values that let a probability of 0.25, 0.5 and 0.75 on the left tail respectively.

So, to find the first quartile, we need to find the z-score for which:

P(Z<z) = 0.25

using the normal table, z is equal to: -0.67

So, the value x equal to the first quartile is:

$z=\frac{x-m}{s}\\ x=z*s +m\\x =-0.67*119 + 462\\x=382.27$

Then, the first quartile is 382.27 and it means that at least el 25% of the scores are less than 382.27 points.

At the same way, the z-score for the second quartile is 0, so:

$x=0*119+462\\x=462$

So, the second quartile is 462 and it means that at least el 50% of the scores are less than 462 points.

Finally, the z-score for the third quartile is 0.67, so:

$x=z*s +m\\x =0.67*119 + 462\\x=541.73$

So, the third quartile is 541.73 and it means that at least el 75% of the scores are less than 541.73 points.

Additionally, the z-score for the 99th percentile is the z-score for which:

P(Z<z) = 0.99

z = 2.33

So, the 99th percentile is calculated as:

$x=z*s +m\\x =2.33*119 + 462\\x=739.27$

So, the 99th percentile is 739.27 and it means that at least el 99% of the scores are less than 739.27 points.

8 0

3 years ago

The water in a swimming pool increased from 4.5 to 6 feet.What is the percent in the water level rounded to the nearest tenth of

GalinKa [24]

(6) / (4.5) = 4 / 3 = 1.333...

The level increased by 33-1/3 % .

The old level was 75% of the new level.

The amount of water in the pool also had to
increase 33-1/3 % . If you didn't have that
much water to put in the pool, you couldn't
change the surface level from 4.5ft to 6ft .

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4 years ago

Yesterday 116 vehicles went through Express Car Wash. Of these vehicles, 74 were minivans. Express the ratio of vehicles other t

riadik2000 [5.3K]

E. 74/116=0.637 hope this helps

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4 years ago

Help a person in need, please!

DENIUS [597]

Answer: d and C i'm pretty sure

Step-by-step explanation:

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3 years ago

In the town of clover, 3 out of 5 citizens who are eligible to vote did so in the fall election.

ArbitrLikvidat [17]

Answer:

Step-by-step explanation:

The amount that actually voted is irrelevant to the question because you cant use the ratio

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3 years ago