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3 years ago

11

A contractor completed five-ninths of a job before a second contractor completed an additional one-third. What fraction of the j

ob is left undone?

1 answer:

Firlakuza [10]3 years ago

8 0

I'd say that your answer would be 4/6=2/3 of the job is incomplete.

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A flagpole is 10 feet tall. It’s shadow is 12 feet long how far is it from the top of the flagpole to the end of its shadow?

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Answer:

The shadow is 11 Ft. away from the pole base.

Step-by-step explanation:

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From the moment the first car started how many hours will it take the second car to catch up to the first

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3 years ago

A rectangular tank that is 5324 ft cubed with a square base and open top is to be constructed of sheet steel of a given thicknes

marishachu [46]

Answer:

Side of 22 and height of 11

Step-by-step explanation:

Let s be the side of the square base and h be the height of the tank. Since the tank volume is restricted to 5324 ft cubed we have the following equation:

$V = s^2h = 5324$

$h = 5324 / s^2$

As the thickness is already defined, we can minimize the weight by minimizing the surface area of the tank

Base area with open top $s^2$

Side area 4sh

Total surface area $A = s^2 + 4sh$

We can substitute $h = 5324 / s^2$

$A = s^2 + 4s\frac{5324}{s^2}$

$A = s^2 + 21296/s$

To find the minimum of this function, we can take the first derivative, and set it to 0

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$2s = 21296/s^2$

$s^3 = 10648$

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$h = 5324 / s^2 = 5324 / 22^2 = 11$

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3 years ago

-Dominant- [34]

X=1, because they both have the same height (y), so they'll cross each other!

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4 years ago

the length of a rectangle is twice its width the perimeter is 48 cm what are the dimensions of the rectangle

inysia [295]

Answer:

The length=16cm and the width=8cm.

Step-by-step explanation:

Given that the length is twice the breadth or width of the rectangle

Let's assume that the breadth of the rectangle is x.

Thus the length is 2x.

Given perimeter=48cm

The formula for the perimeter of a rectangle is 2(l+b) where l is length and b is breadth.

2(x+2x)=48

(3x)=48/2

3x=24

x=8cm

2x=16cm

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