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3 years ago

What is the value of (-0.4)^3

Mathematics

2 answers:

Fittoniya [83]3 years ago

6 0

Answer:

-(2/5)^3 or -8/125 or -0.064

Step-by-step explanation:

convert the decimal into a fraction

then use your calculator to find the exact answer

Pie3 years ago

4 0

Answer:

simplify 2/5

equation at the end of step 1:

(0-2/5)^3

step 2:

2.1

Negative number raised to an odd power is negative

To show this we begin with (-7)5 ,a negative number raised to an odd exponent:

(-7)5 can be written as (-7)•(-7)•(-7)•(-7)•(-7)

Now, using the rule that says minus times minus is plus, (-7)5 can be written as (49)•(49)•(-7) which is a negative number.

We showed that (-7)5 is a negative number

Using the same arguments as above, replacing (-7) by any negative number, and replacing the exponent 5 by any odd exponent, we proved which had to be proved

final result:-2^3/5^3=-0.06400

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Help please if you know this

Oksana_A [137]

Answer:

The awnser is 11

Step-by-step explanation:

I know this is the right answer trust me.

7 0

3 years ago

the area of a rectangle is 30 to the square root of 3750 square inches, and the length is 3 to the square root of 250 inches. wh

uranmaximum [27]

<h3>Answer:</h3>

$\sf { width =10 \sqrt{15} \:inches}$

<h3>Solution:</h3>

We are given that:

Area of rectangle is 30√3570
Length of the rectangle is 3√250

Area of rectangle is given by:

$\implies\quad{\pmb{ \sf{Area = length\times width}} }$

Hence, putting the values in the formula:

$\implies\quad \sf{ A = l\times w}$

$\implies\quad \sf{ 30\sqrt{3750}=3\sqrt{250}\times w}$

$\implies\quad \sf{3\sqrt{250}\times w = 30\sqrt{3750} }$

$\implies\quad \sf{ w =\dfrac{30\sqrt{3750}}{3\sqrt{250}}}$

$\implies\quad \sf{ w =10\dfrac{\sqrt{3750}}{\sqrt{250}}}$

$\implies\quad \sf{ w = 10\times\sqrt{\dfrac{3750}{250}}}$

$\implies\quad \underline{\underline{\pmb{\sf{ w =10\sqrt{15}}}}}$

8 0

3 years ago

After learning how to fly, Wendy reduced her daily commute time by 75% Previously, her commute took m minutes. Which of the foll

Westkost [7]

Answer:

Given:

(i) Wendy reduced her daily commute time by 75% by learning how to fly.

(ii) Previously, it took her 'm' minutes to commute.

To find:

(i) Wendy's commute time in minutes after she learned how to fly.

Solution:

Given that earlier it took Wendy 'm' minutes to commute.

After learning how to to fly, the commute time reduced by 75%.

So, time taken now = (100-75)% of previous time

= 25% of 'm' minutes

= \frac{25m}{100}

100

25m

= \frac{m}{4}

So, the time taken by Wendy now is \frac{m}{4}

minutes.

5 0

4 years ago

One number is 33 times a first number. a third number is 100 more than the first number. if the sum of the three numbers is 3103

kherson [118]

Create some expressions.

1# number: x

2# number: 33x

3# number: 100 + x

this all equals to 310310 when added so

x+33x+(x+100) = 310310

Solve what you know first then rearrange it.

34x + x + 100 = 310310

35x = 310310-100

35x = 310210

x = 310210/35

x = 8863.142857

Substitute the x into the expressions made and you'll find the 2# and 3# number. You've already found the 1# number since it's only x.

7 0

3 years ago

Find the domain and range of f(x)=x-3/2x+1 please show steps

anygoal [31]

Answer:

Domain: ( − ∞ , ∞ ) , { x | x ∈ R }

Range: ( − ∞ , ∞ ) , { y | y ∈ R }

Step-by-step explanation:

You cant show steps just when graphing it you will see

6 0

3 years ago