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NARA [144]
3 years ago
8

Part B In part A you simplified the expression 4+ 16 - (4)5) What other type of expression does this expression remind you 2 of?

What concepts have you learned about in the past that complex numbers can help with?​
Mathematics
1 answer:
WARRIOR [948]3 years ago
5 0

The expression in part A is similar to the quadratic formula. So, it’s likely that complex numbers can help us solve quadratic equations that have imaginary solutions and that we would have labeled as having no solution if using only real numbers.

[ACCORDING TO PLATO]

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To get to school, Grayson usually walks 1.5 miles west and 0.8 miles north on the sidewalks. Because he is in a hurry, he has de
Alex17521 [72]

Answer:

Grayson has to walk 1.7 miles across the field.

Step-by-step explanation:

We have drawn the diagram for your reference.

Given:

Grayson usually walks 1.5 miles west on the side walks

According to Diagram we can say;

CA = 1.5 miles

Also Given:

Grayson also walks 0.8 miles north on the sidewalks

So According to Diagram we can say;

BA =0.8 miles

Now we need to find number of miles Grayson have to walk across the field.

According to diagram we can say;

We have to find CA.

Assuming the diagram  to be right angled triangle.

We can find CA using Pythagoras theorem.

{CA}^2 = {CB}^2+{BA}^2

Substituting the given values we get;

{CA}^2 =1.5^2+0.8^2 = 2.25 +0.64 =2.89

Taking square root on both side we get;

\sqrt{{CA}^2} = \sqrt{2.89} \\\\CA = 1.7 \ mi

Hence Grayson has to walk 1.7 miles across the field.

4 0
3 years ago
A 200-liter tank initially full of water develops a leak at the bottom. Given that 20% of the water leaks out in the first 5 min
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Answer:

127.53 liters left after 10 minutes

Step-by-step explanation:

Let

A \to Amount

t \to time

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Required

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To do this, we make use of:

A(t) = A(0) * e^{kt}

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160 = 200 * e^{k*5}

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0.80 = e^{k*5}

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\ln(0.80) = \ln(e^{k*5})

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\ln(0.80) = 5k\ln(e)

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-0.223 = 5k

Divide by 5

k = -0.045

So, the function is:

A(t) = A(0) * e^{kt}

A(t) = 200 * e^{-0.045t}

The amount after 10 minutes is:

A(10) = 200 * e^{-0.045*10}

A(10) = 200 * e^{-0.45}

A(10) = 127.53

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Step-by-step explanation:

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Answer:

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