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3 years ago

How to find the square root and cube root of a number?

2 answers:

6 0

To find the cube root of a number, you want to find some number that when multiplied by itself twice gives you the original number. In other words, to find the cube root of 8, you want to find the number that when multiplied by itself twice gives you 8. The cube root of 8, then, is 2, because 2 × 2 × 2 = 8.

Vladimir79 [104]3 years ago

5 0

Square root:

Finding the square root of a number is the inverse operation of squaring that number. Remember, the square of a number is that number times itself. The perfect squares are the squares of the whole numbers. The square root of a number, n, written below is the number that gives n when multiplied by itself.

Cube root explanation is up top.

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The function C(x)=−20x+1681 represents the cost to produce x items. What is the least number of items that can be produced so th

Reptile [31]

Answer:

The least number of items to produce is 41

Step-by-step explanation:

Average Cost

Given C(x) as the cost function to produce x items. The average cost is:

$\displaystyle \bar C(X)=\frac{C(x)}{x}$

The cost function is:

$C(x) = -20x+1681$

And the average cost function is:

$\displaystyle \bar C(X)=\frac{-20x+1681}{x}$

We are required to find the least number of items that can be produced so the average cost is less or equal to $21.

We set the inequality:

$\displaystyle \frac{-20x+1681}{x}\le 21$

Multiplying by x:

$-20x+1681 \le 21x$

Note we multiplied by x and did not flip the inequality sign because its value cannot be negative.

Adding 20x:

$1681 \le 21x+20x$

$1681 \le 41x$

Swapping sides and changing the sign:

$41x \ge 1681$

Dividing by 41:

$x\ge 41$

The least number of items to produce is 41

8 0

3 years ago

Point B is the center of a circle, and AC is a diameter of the circle. Point D is a point on the circle different from A and C.

seropon [69]

BA and BD are radii of the circle, so triangle ABD is isosceles. Then angles BDA and BAD are congruent, and the remaining (central) angle ABD has measure

$m\angle ABD=(180-2\cdot20)^\circ=140^\circ$

Angles ABD and CBD are supplementary, so

$m\angle CBD=(180-140)^\circ=40^\circ$

and the answer is E.

8 0

3 years ago

Lina spent 1/3 of her money. She now has $20 left. How much money did she have originally

PSYCHO15rus [73]

Answer:

Step-by-step explanation:

1/3 of 60 is 20

in other words

20 x 3 = 60

8 0

3 years ago

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How was FDR a lasting impact on today's society?

Gre4nikov [31]

Answer:

He created numerous programs to provide relief to the unemployed and farmers while seeking economic recovery with the National Recovery Administration and other programs

He also instituted major regulatory reforms related to finance, communications, and labor, and presided over the end of Prohibition

Step-by-step explanation:

Hope this helps:)

7 0

3 years ago

Hey can yalls help me plz

katen-ka-za [31]

Answer:

Step-by-step explanation:

4 0

3 years ago

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