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butalik [34]
3 years ago
10

The selling price of an item is ​$ 455 After 6 months of not​ selling, it is marked down by 20​%. After another 6 months of not​

selling, it is further marked down by 30​%. Find the sale price after both markdowns.
Mathematics
1 answer:
Nitella [24]3 years ago
7 0
X/455=0.8
X=0.8*455
X=$364

Y/455=0.7
Y=455*0.7
Y=$318.5

Hope this helps!
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An open-top box with a square base is to have a volume of 4 cubic feet. Find the dimensions of the box (in ft) that can be made
Lemur [1.5K]

Answer:

The dimension of box=2ft\times 2ft\times 1ft

Step-by-step explanation:

We are given that

Volume of box=4 cubic feet

Let x be the side of square base and h be the height of box

Volume of box=lbh=x^2h

4=x^2h

h=\frac{4}{x^2}

Now, surface area of box,A=x^2+4xh

A=x^2+4x(\frac{4}{x^2})=x^2+\frac{16}{x}

\frac{dA}{dx}=2x-\frac{16}{x^2}

\frac{dA}{dx}=0

2x-\frac{16}{x^2}=0

2x=\frac{16}{x^2}

x^3=8

x=2

\frac{d^2A}{dx^2}=2+\frac{32}{x^3}

Substitute x=2

\frac{d^2A}{dx^2}=2+\frac{32}{2^3}=2+4=6>0

Hence, the area of box is minimum at x=2

Therefore, side of square base,x=2 ft

Height of box,h=\frac{4}{2^2}=1 ft

Hence, the dimension of box=2ft\times 2ft\times 1ft

5 0
2 years ago
ray uses a fourth of a gallon of gasoline to drive a distance of 5 1/2 miles at this rate how many miles can you drive on one ga
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4 0
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a circle with a circumference of 6 has an arc with a 20 degree central angle.What is the length of the arc
alex41 [277]

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Step-by-step explanation:

7 0
2 years ago
F(x) = 2x - 4<br> f(3) = [?]
Serga [27]
2 would be the answer. Replace the x with the three and multiply that with the 2 and then subtract 4.
5 0
3 years ago
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after the holiday season, the average number of costumers per day at the game galaxy store decreased from 612 to 450. find the p
andrey2020 [161]
Simple, finding markdown, use these two formulas.

Markdown=Original-New
and
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So,

Markdown=612-450
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M%=26.5 (rounded)

Thus, there was a 26.5% decrease.
5 0
3 years ago
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