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2 years ago

PLS HURRY WILLL GIVE BRAINLIEST!!! Which is the simplified form of ( 9c^-9 )^-3 ?

Mathematics

1 answer:

Oliga [24]2 years ago

3 0

Answer:

Your answer is B: 1/729c^27

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$239.16 with a 5% sales tax

deff fn [24]

Price would be 251.12 tax is 11.96

8 0

3 years ago

Daniel needs to sell candy bars For a club fundraiser. She starts with 72 candy bars and begin selling at a constant rate of eig

viktelen [127]

This is an equation that demonstrated the word problem. 8x=72. 8 represents the constant rate of candy bar's she sell each day. X represents the number of days it will take her to sell all the candy hard, and 72 is the number of candy bar's she needs to sell.

It will take Danielle 9 days to sell 72 candy bar's because 9*8=72.

please vote my answer brainliest. thanks!

3 0

3 years ago

[25 POINTS] A cylinder has a volume of 400π cm3. Find the dimensions that minimize its surface area.

miss Akunina [59]

Answer:

r = 5.848cm, h = 11.696cm

Step-by-step explanation:

Surface area: $SA=2\pi rh+2\pi r^2$

Volume: $V=\pi r^2h$

Therefore, the height of a cylinder given its volume would be $h=\frac{V}{\pi r^2}$ , thus:

$SA=2\pi r(\frac{V}{\pi r^2})+2\pi r^2\\\\SA=\frac{2V}{r}+2\pi r^2\\\\SA=\frac{2(400\pi)}{r}+2\pi r^2\\\\SA=\frac{800\pi}{r}+2\pi r^2$

We now find the derivative of the surface area of the cylinder with respect to its radius and set it equal to 0, solving for the radius:

$\frac{d(SA)}{dr}=-\frac{800\pi}{r^2}+4\pi r$

$0=-\frac{800}{r^2}+4\pi r$

$0=800\pi+4\pi r^3$

$-800\pi=4\pi r^3$

$-200=r^3$

$r\approx5.848$

If $0If [tex]r>5.848$ , then the surface area of the cylinder increases

Therefore, the surface area is minimized when the radius is $r=5.848cm$ , making the minimum height $h=\frac{V}{\pi r^2}=\frac{400\pi}{\pi(5.848)^2}\approx11.696cm$ .

In conclusion, the 2nd option is correct.

3 0

2 years ago

Determine the # of rollovers and total cost # of rollovers

miv72 [106K]

Answer:

7747747474774774u4774748 answer

7 0

2 years ago

Sam owns a chain of fast food restaurants that operated 200 stores in 1999. If the rate of increase is 8% annually, how many sto

yawa3891 [41]

Answer:

370 stores

Step-by-step explanation:

Given data

initial number of stores P= 200

r= 8%

t= 1999-2007= 8 years

Let us apply the compound interest expression to find the final amount of stores

A= P(1+r)^t

A= 200(1+0.08)^8

A= 200(1.08)^8

A= 200*1.85

A=370

Hence the number of stores in 2007 is 370 stores

4 0

2 years ago