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3 years ago

I’m in a hurry please help,can someone do theses 2 problems??

Mathematics

1 answer:

Shkiper50 [21]3 years ago

7 0

Irrational numbers never end and they never repeat. They can never be written as a fraction. An example of an irrational number is pi.

Rational numbers can be written as fractions; when written as decimals they either end or repeat in a pattern. An example of a rational number is 9.

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Let's start on the left box:

$\sqrt{16}$ = 4, so it is rational.

1/2 is a fraction, so it is rational.

. $\overline {5}$ is repeating, so it is rational.

-10 is a whole number, so it is rational.

5 is a whole number, so it is rational.

$\sqrt{18}$ = 4.24264... so it is NOT rational.

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Moving on to the right box:

$\sqrt{20}$ = 4.4721... so it is irrational.

3 1/4 is a fraction, so it is NOT irrational.

.12345... is never ending and unrepeating, so it is irrational.

25 is a whole number, so it is NOT irrational.

5.55555... is repeating, so it is NOT irrational.

$\sqrt{1}$ = 1, so it is NOT irrational.

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kirill [66]

The multiplier each year is 1.02, so the multiplier for 7 years is 1.02^7.

220,000*1.02^7 ≈ 252,700

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4 0

4 years ago

(-4a^3b^2?)^2 •(3a²b)

uranmaximum [27]

Answer:

48a^7 b^5 (I hope I got this right, it has been awhile since I've done equations like these)

Step-by-step explanation:

(-4a^3 b^2)^2 × (3a^2 b)

16a^5 b^4 × 3a^2 b

48a^7 b^5

5 0

3 years ago

Jordan built her cat Tuna a new scratching post. She needs to cover the post with carpet. How much carpet does Jordan need to co

Marrrta [24]

Answer:

Jordan needs $3,800\ cm^2$ of carpet to cover the surface area of the post

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The surface area of a prism is equal to

$SA=2B+Ph$

where

B is the area of the base of the prism

P is the perimeter of the base of the prism

h is the height of the prism

<em>Find the area of the base B</em>

$B=10^2=100\ cm^2$

<em>Find the perimeter of the base P</em>

$P=4(10)=40\ cm$

we have the height h

$h=90\ cm$

substitute the values

$SA=2(100)+40(90)$

$SA=3,800\ cm^2$

5 0

3 years ago

Read 2 more answers

Explain how to solve 4^x+3 = 7 using the change of base formula log base b of y equals log y over log b. Include the solution fo

Masja [62]

The value of x is 1

Explanation:

The equation is $4^x+3=7$

Subtracting both sides by 3, we get,

$4^x=4$

Taking log on both sides, we get,

$\log 4^{x}=\log 4$

Rewriting the equation by $4^{x}=u$

Thus, we have,

$\log u=\log 4$

Applying log rule, if $\log f(x)=\log g(x)$ , then $f(x)=g(x)$

Thus, $u=4$

Substituting $u=4$ in $4^{x}=u$ , we get,

$4^x=4$

Also, since, $a^{f(x)}=a^{g(x)}$ , then $f(x)=g(x)$

Thus, $x=1$

Hence, the value of x is 1

7 0

3 years ago

A rectangular solid has sides of 10 cm, 6.5cm and 8.3 cm. What is the volume and the surface area?

dangina [55]

Part (1):
Volume of the rectangular prism can be calculated as follows:
volume = length * width * height
We are given the three dimensions, therefore, all we need to do is substitute in the above equation as follows:
volume = 10 * 6.5 * 8.3
volume = 539.5 cm³

Part (2):
Surface area of rectangular prism an be calculated as follows:
Surface area = 2(length*width) + 2(width*height) + 2(length*height)
Surface area = 2(10*6.5) + 2(6.5*8.3) + 2(10*8.3)
Surface area = 130 + 107.9 + 166
Surface area = 403.9 cm²

Hope this helps :)

3 0

4 years ago