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sveta [45]
2 years ago
5

The phrase "miles per hour" is an example of a rate of change. What other commonly used rates of change can you think of in ever

yday speech?
I NEED SOMETHING DIFFERENT THAN SPEED PLEASE
Mathematics
1 answer:
damaskus [11]2 years ago
7 0

Maybe fast or quick?

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louise bought 80 metres of fencing to make an enclosure for her pet dog .tommy if louise expects a rectangular enclosure what is
OleMash [197]

Answer:

400 m^2.

Step-by-step explanation:

The largest  area is obtained where the enclosure is a square.

I think that's the right answer because a square is a special form of a rectangle.

So the square would be 20 * 20  = 400 m^2.

Proof:

Let the  sides of the rectangle be x and y m long

The area A = xy.

Also the perimeter  2x + 2y = 80

x + y = 40

y = 40 - x.

So substituting for y in A = xy:-

A = x(40 - x)

A = 40x - x^2

For maximum value of A  we find the derivative and equate it to 0:

derivative A' =  40 - 2x = 0

2x = 40

x = 20.

So y = 40 - x

= 40 - 20

=20  

x and y are the same value so x = y.

Therefore for maximum area the rectangle is a square.

3 0
3 years ago
Someone please teach me how to calculate simplest radical form
IceJOKER [234]

Answer:

Before we can simplify radicals, we need to know some rules about them. These rules just follow on from what we learned in the first 2 sections in this chapter, Integral Exponents and Fractional Exponents.

Expressing in simplest radical form just means simplifying a radical so that there are no more square roots, cube roots, 4th roots, etc left to find. It also means removing any radicals in the denominator of a fraction

Step-by-step explanation:

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3 years ago
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Olivia has 680 to spend at a bicycle store for some new gear and biking outfits
stira [4]
What is the question
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3 years ago
Find the unit rate.<br><br> 360 miles in 8 hours
NikAS [45]

Answer:

45 miles per hour.

Step-by-step explanation:

360 / 8

= 45 miles per hour.

6 0
3 years ago
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Over the weekend, I bought a dress for $23.96, a pair of
Inga [223]

Answer:

4.94

Step-by-step explanation:

6 0
3 years ago
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