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3 years ago

How to convert 4/80 into a percentage

Mathematics

2 answers:

Alona [7]3 years ago

7 0

Answer:

5.0

Step-by-step explanation:

you convert into decimal 0.05 and move two places to the right. 5.0

Zolol [24]3 years ago

3 0

Answer:

4/80= 1/20

1/20= .05

.05= 5%

Step-by-step explanation:

a fraction, it is a division, solve it and it will give you a decimal number, that decimal number can be converted into a percentage very easy, I teach you:

When a fraction when solving gives 1, that means it is 100%, therefore if a fraction gives us .5, it means that it is 50%, when there are 2 decimals, such as: 1/3 = .3333 = 33.3333%.

The decimal point is shifted 2 places to its right and then "%" is added, resulting in a percentage

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the length of a soccer pitch is 20 m less than twice its width. the area of the pitch is 6000m^2. find its dimensions.

Setler79 [48]

X=width of a coccer pitch
2x-20=length of a soccer pitch
Area (rectangule)=length x width
We suggest this equation:
x(2x-20)=6000
2x²-20x=6000
2x²-20x-6000=0
x²-10x-3000=0
We solve this quadratic equation:

x=[10⁺₋√(100-4*1*-3000)]/2=[10⁺₋√(100+12000)]/2=
=(10⁺₋110)/2
we have two solutions:
x₁=(10-110)/2=-50, invalid solution.
x₂=(10+110)/2=60

x=60
2x-20=2(60)-20=120-20=100

Solution: the length is 100 m, and the width is 60 m.

To check:
Area=100 m*60 m=6000 m²
The twice of width is =2(60 m)=120 m,
20 m less than twice its width is: 120 m-20 m=100 m=the length.

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3 years ago

What is the surface area of the right cylinder with a height of 20 and a radius of 5

Alex17521 [72]

Answer: The answer is 785.4

Step-by-step explanation: Equation is 2πrh+2πr²

Plug in your numbers and hit enter!

Hope this helps

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3 years ago

Read 2 more answers

11 The net force on a vehicle that is accelerating at a rate of 1.5 m/s² is 2,800 newtons. What is

ololo11 [35]

Answer:

$Mass = 1867kg$

Step-by-step explanation:

Given

$Force = 2800N$

$Acceleration = 1.5m/s^2$

Required

Determine the mass of the vehicle

This question will be answered using Newton's second law

$Force = Mass * Acceleration$

Substitute values for Force and Acceleration

$2800 = Mass * 1.5m/s^2$

Make Mass the subject

$Mass = \frac{2800N}{1.5m/s^2}$

$Mass = 1866.6667kg$

$Mass = 1867kg$ ---- approximated

<em>Hence, the mass of the vehicle is 1867kg</em>

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2 years ago

Find an equation of the circle that has center (-4, 1) and passes through (3, -5)

Lemur [1.5K]

The general equation for a circle with center (a,b) and squared radius k is

$(x-a)^2 + (y-b)^2 = k$

Here we have

$(x- - 4)^2 + (y -1)^2 = k$

and the constant is fixed by substituting in the point we know (x,y)=(3,-5)

$(x + 4)^2 + (y-1)^2 = (3+4)^2 + (-5-1)^2 = 85$

Answer:

$(x + 4)^2 + (y-1)^2 = 85$

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2 years ago

1. The formula for the velocity of an object is d=v/t, where v is the object, d is the distance traveled, and t is the time the

Arlecino [84]

Answer:

you need to isolate t or time

you need to know distance between sun and earth and velocity of them in order to calculate how long it takes for light to travel from the Sun to Earth

Step-by-step explanation:

$t*(d)=(v/t)*t\\td= v\\\\\frac{td}{d} =v/d \\t=v/d$

to find time you multiply t to both sides then you cancel t from where velocity is and you get velocity by itself

now you mulipy d to both side to get v over d and time by itself

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3 years ago