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natita [175]
2 years ago
12

if there are 20 questions on a test and I get 45% on the test how much is each question worth percent wise?? using numbers and t

oo how much each question is worth through percentages
Mathematics
2 answers:
m_a_m_a [10]2 years ago
8 0
Each question is worth 5 points
alexdok [17]2 years ago
6 0

Answer:

Each question worth 5.

Step-by-step explanation:

Each question worth 5 Point because

5 x 20 = 100

Hence, 20 question each question worth 5 point.

If You get a 45% then you miss 11 question and only get 9 question correct..

9/20 x 100 = 45.

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Find the volume of a triangular pyramid with a base area of 24 ft2 and a height of 18 ft.
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Volume = (1/3) * base area * height
              = 1/3 * 24 * 18
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4 0
2 years ago
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A rancher wants to fence in an area of 1500000 square feet in a rectangular field and then divide it in half with a fence down t
VLD [36.1K]

Answer:

6000 ft

Step-by-step explanation:

Let length of rectangular field=x

Breadth of rectangular field=y

Area of rectangular field=1500000 square ft

Area of rectangular field=l\times b

Area of rectangular field=x\time y

1500000=xy

y=\frac{1500000}{x}

Fencing used ,P(x)=x+x+y+y+y=2x+3y

Substitute the value of y

P(x)=2x+3(\frac{1500000}{x})

P(x)=2x+\frac{4500000}{x}

Differentiate w.r.t x

P'(x)=2-\frac{4500000}{x^2}

Using formula:\frac{dx^n}{dx}=nx^{n-1}

P'(x)=0

2-\frac{4500000}{x^2}=0

\frac{4500000}{x^2}=2

x^2=\frac{4500000}{2}=2250000

x=\sqrt{2250000}=1500

It is always positive because length is always positive.

Again differentiate w.r.t x

P''(x)=\frac{9000000}{x^3}

Substitute x=1500

P''(1500)=\frac{9000000}{(1500)^3}>0

Hence, fencing is minimum at x=1 500

Substitute x=1 500

y=\frac{1500000}{1500}=1000

Length of rectangular field=1500 ft

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Substitute the values

Shortest length of fence used=2(1500)+3(1000)=6000 ft

Hence, the shortest length of fence that the rancher can used=6000 ft

3 0
3 years ago
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Answer:

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2 years ago
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Answer:

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Step-by-step explanation:

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------------------  = -------------- =  -------        =   3/5

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we can tell the slope is positive because it goes from bottom left to top right

a negative slope goes from top left to bottom right

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