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3 years ago

HELP PLEASEEE!!

Mathematics

1 answer:

Inessa05 [86]3 years ago

6 0

Answer:

Cylinder

Step-by-step explanation:

Plot the points to find out that:

ABCD is a rectangle with one side on the y-axis.

When rotated about the y-axis we'll get a cylinder.

The radius of the cylinder is 3 units and the height is 4 units.

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Write the standard form of the equation of the parabola with the given focus or directrix and

horsena [70]

Answer:

x = 1/20 y^2

Step-by-step explanation:

This is a rightward opening (sideways ) parabola

Directrix = x = -5

Distance formula form point x,y to directrix and focus are equal:

(x - -5)^2 = (x-5)^2 + y^2

x^2 + 10x + 25 = x^2 - 10x + 25 + y^2

20x = y^2

x = 1/20 y^2

3 0

2 years ago

Select the correct answer from the each drop-down menu. if 0

diamong [38]

Answer:

You didn't provide a image of the problem how am I suppose to help you

8 0

2 years ago

In scientific notation

mrs_skeptik [129]

$(3.9 \times {10}^{ - 3}) + 0.0026 =$

$(39 \times {10}^{ - 4}) + (26 \times {10}^{ - 4}) =$

$39 \times {10}^{ - 4} + 26 \times {10}^{ - 4} =$

$Factoring \: {10}^{ - 4}$

${10}^{ - 4} \times (39 + 26) =$

$65 \times {10}^{ - 4} = 6.5 \times {10}^{ - 3}$

_________________________________

And we're done.

Thanks for watching buddy good luck.

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8 0

3 years ago

As part of his retirement strategy, John plans to invest $210,000 in two different funds. He projects that the moderately high r

Maslowich

Answer:

Therefore he invested $60,000 at 9% per year and $(210,000-60,000)=$150,000 at 4% per year.

Step-by-step explanation:

Given John plans to invest $210,000 in two different funds. He projects that the moderately high risk investments should return, overtime 9% per year,while low risk investments should return about 4% per year.

He wants a supplemental income of$11,400 a year.

Let , he invested $x at 9% per year and $(210,000-x) at 4% per year.

$interest=\frac{prt}{100}$ p = principle , r = rate of interest and t = time

The interest earns at 9% per year= $\frac{x\times 9\times 1}{100}$

The interest earns at 4% per year= $\frac{(210,00-x)\times 4 \times 1}{100}$

According to the problem,

$\frac{x\times 9\times 1}{100}+\frac{(210,00-x)\times 4 \times 1}{100}= 11400$

$\Leftrightarrow 9x+840000-4x=11400 \times 100$

$\Leftrightarrow 5x=1140000-840000$

$\Leftrightarrow x=\frac{300000}{5}$

$\Leftrightarrow x=60,000$

Therefore he invested $60,000 at 9% per year and $(210,000-60,000)=$150,000 at 4% per year.

7 0

3 years ago

A circular merry-go-round has a radius of 5 feet. Find the distance of a spin of one full rotation. Use 3.14 for pi and round th

Sedbober [7]

Option C

The distance of a spin of one full rotation is 31.4 feet

Solution:

Given that,

A circular merry-go-round has a radius of 5 feet

Radius = 5 feet

We have to find the distance of spin for one full rotation

Distance covered in 1 full of rotation is equal to circumference of circle

The circumference of circle is given as:

$C = 2 \pi r$

Where "r" is the radius

$C = 2 \times 3.14 \times 5\\\\C = 6.28 \times 5\\\\C = 31.4$

Thus the distance of a spin of one full rotation is 31.4 feet

6 0

3 years ago