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devlian [24]
3 years ago
10

In January, Music Marathon priced all the compact discs (CD’s) at $20. In February, these same CD’s were discounted 50% and in M

arch they were reduced an additional 10%. What was the price of one CD after both discounts?
Mathematics
1 answer:
skad [1K]3 years ago
3 0

Answer:I think it would be $9

Step-by-step explanation:

50% of 20 is $10

10% of $10 is $1

Subtract 1 from 10, which gives you $9

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Answer:

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

Step-by-step explanation:

We are given that

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

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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}

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

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5 0
2 years ago
a pattern has 14 triangles to every 18 yellow triangles. what is the ratio of yellow triangles to blue triangles?
erma4kov [3.2K]
9:7
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3 years ago
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8 0
3 years ago
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