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3 years ago

Really need big help on this one please

Mathematics

1 answer:

Valentin [98]3 years ago

7 0

Answer:

Answer equals to 55.75ftsquare

Step-by-step explanation:

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Use the F-scale measurements of tornadoes listed in the accompanying table. The range of the data is 4.0. Use the range rule of

Tcecarenko [31]

Answer:

Within 0.5 of ;

is not ;

Step-by-step explanation:

Given the data:

The actual standard deviation, = 1

;

The range rule of thumb to estimate the value if standard deviation is ;

Estimated standard deviation = Range / 4

The range = (maximum - minimum) values

The estimated standard deviation = 4 / 4 = 1

Hence, the estimated standard deviation is with 0.5 of the actual standard deviation, Thus, the estimated standard deviation is not substantially different from the actual standard deviation.

4 0

3 years ago

What is the greatest common factor of the terms in the polynomial 4x^4-32x^3-60x^2?

jonny [76]

Answer:

$\mathrm{Factor}\:4x^4-32x^3-60x^2:\quad 4x^2\left(x^2-8x-15\right)\\$

$\mathrm{Apply\:exponent\:rule}:\quad \:a^{b+c}=a^ba^c\\x^3=xx^2\\x^4=x^2x^2\\=4x^2x^2-32xx^2-60x^2\\\mathrm{Rewrite\:}60\mathrm{\:as\:}4\cdot \:15\\\mathrm{Rewrite\:}32\mathrm{\:as\:}4\cdot \:8\\=4x^2x^2-4\cdot \:8xx^2-4\cdot \:15x^2\\\mathrm{Factor\:out\:common\:term\:}4x^2\\=4x^2\left(x^2-8x-15\right)$

<em>Hope this helps and have a great day!!!</em>

<em> $Sofia$ </em>

4 0

3 years ago

Marco's mom gave him d dollars for his allowance one week. He also earned $14.55 for his newspaper route that week.

myrzilka [38]

Answer:

The answer is d+14.55

hope it helps!

7 0

3 years ago

Let u = <-4, 3>. Find the unit vector in the direction of u, and write your answer in component form. (2 points)

lana66690 [7]

Answer: < -4/5, 3/5>

This is equivalent to writing < -0.8, 0.6 >

======================================================

Explanation:

Draw an xy grid and plot the point (-4,3) on it. Draw a segment from the origin to this point. Then draw a vertical line until reaching the x axis. See the diagram below.

We have a right triangle with legs of 4 and 3. The hypotenuse is $\sqrt{4^2+3^2} = \sqrt{16+9} = \sqrt{25} = 5$ through use of the pythagorean theorem.

We have a 3-4-5 right triangle.

Therefore, the vector is 5 units long. This is the magnitude of the vector.

Divide each component by the magnitude so that the resulting vector is a unit vector pointing in this same direction.

Therefore, we go from < -4, 3 > to < -4/5, 3/5 >

This is equivalent to < -0.8, 0.6 > since -4/5 = -0.8 and 3/5 = 0.6

Side note: Unit vectors are useful in computer graphics.

6 0

2 years ago

I would like some real-world situations that use linear input-output relationship, however, it must be unique. Not simple exampl

hichkok12 [17]

Answer:

given a linear function represented by a table of values and a linear function ... Students may have trouble with the word unique. ... How do you determine if relations are functions? ... How can you use functions to model real-world situations? ... said while there was input and output, she thought the machine was more like a.

Step-by-step explanation:

6 0

2 years ago