How can estimation help me to find the area of a rectangle or square

1 answer:

6 0

If you know your multiplication tables it becomes quite simple to find the area of a rectangle. You can round your lengths up or down accordingly to find the area of a figure. For example, what if we had a square 2.334" by 3.574"? The 2.334 rounds down to 2 and the 3.574 rounds up to 4. Now we have a 2 by 4" rectangle. Now we find our area. 2*4=8 inches squared. Does that answer your question?

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A large paperclip is 7 1/8 inches long. How many paper clips will it take to lay them end to end to have 45 inches.

aleksandr82 [10.1K]

Answer:

6 Paperclips

Step-by-step explanation:

You first step would be to do 45 divide 7 1/8. Your answer would then be 6 6/19. The last step would be to round 6 6/19. Your answer would then be 6. Your answer would be 6, because you cant have 6/19 of a paper clip.

3 0

2 years ago

[(1/(3+x))-(1/3)] / x<br> Limit 0

Effectus [21]

First find a common denominator and combine the fractions in the numerator:

$\displaystyle\lim_{x\to0}\frac{\dfrac1{3+x}-\dfrac13}x=\lim_{x\to0}\frac{\dfrac3{3(3+x)}-\dfrac{3+x}{3(3+x)}}x=\lim_{x\to0}\frac{3-(3+x)}{3x(3+x)}$

Now simplify and cancel out all the terms that you can:

$\displaystyle\lim_{x\to0}\frac{3-3-x}{3x(3+x)}=-\frac13\lim_{x\to0}\frac1{3+x}$

Since the remaining expression is continuous as a function of $x$ , you can directly substitute to end up with

$\displaystyle-\frac13\lim_{x\to0}\frac1{3+x}=-\frac13\times\frac1{3+0}=-\frac19$

8 0

2 years ago

(20+.5x)+.15(20+.5x)how do you work this question out

Veronika [31]

Distribute the .15 on the right side to get:
20 + .5x + 3 + .075x

Then, combine like terms (add numbers together and add x terms together):
.575x + 23

...and that's your final answer!

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2 years ago

Problem page the diameter of a circle measures 28mm . what is the circumference of the circle? use 3.14 for π , and do not round

Vilka [71]

Circumstance of a circle is equal to 2pi*radius.
Diameter is twice as long as radius, so the radius of this circle is 14 mm (half of 28).

2 * 3.14 * 14 = 87.92 mm

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3 years ago

What is the value of y at the y-intercept of the equation 10x + 3y=12.

Lyrx [107]

Answer:

Y = 4 - $\frac{10x}{3}$

Step-by-step explanation:

Move all terms that don't contain y to the right side and solve.

7 0

2 years ago