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3 years ago

Is 70 thousand written in standard form or word form ? Explain

2 answers:

8 0

Standard Form. This is the answer because if you know what word form is, it is basically a number that is written in letters. Standard Form is like saying the actual number. Thanks! Brainly Team

Ganezh [65]3 years ago

3 0

It's kind of both because word form would be Seventy thousand and standard form would be 70,000.

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2x+4≥24 how do I solve this problem

Katen [24]

First subtract 4 then divide 2 so u can isolate x

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3 years ago

An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the ref

hichkok12 [17]

Answer:

P is exactly 3km east from the oil refinery.

Step-by-step explanation:

Let's d be the distance in km from the oil refinery to point P. So the horizontal distance from P to the storage is 3 - d and the vertical distance is 2. Hence the diagonal distance is:

$\sqrt{(3 - d)^2 + 2^2} = \sqrt{(3 - d)^2 + 4}$

So the cost of laying pipe under water with this distance is

$800000\sqrt{(3 - d)^2 + 4}$

And the cost of laying pipe over land from the refinery to point P is 400000d. Hence the total cost:

$800000\sqrt{(3 - d)^2 + 4} + 400000d$

We can find the minimum value of this by taking the 1st derivative and set it to 0

$800000\frac{2*0.5*(3-d)(-1)}{\sqrt{(3 - d)^2 + 4}} + 400000 = 0$

We can move the first term over to the right hand side and divide both sides by 400000

$1 = 2\frac{3 - d}{\sqrt{(3 - d)^2 + 4}}$

$\sqrt{(3 - d)^2 + 4} = 6 - 2d$

From here we can square up both sides

$(3 - d)^2 + 4 = (6 - 2d)^2$

$9 - 6d + d^2 + 4 = 36 - 24d + 4d^2$

$3d^2-18d+27 = 0$

$d^2 - 6d + 9 = 0$

$(d - 3)^2 = 0$

$d -3 = 0$

d = 3

So the cost of pipeline is minimum when P is exactly 3km east from the oil refinery.

3 0

3 years ago

The population of a town is 2100 and increasing at a rate of 1.3% per year, while the number of cats in the town is currently 10

stich3 [128]

Answer:

when # cats exceeds 2,313

Step-by-step explanation:

if you graph y = .013x + 2100 and y = .08 + 1000 you will see the lines intersect when the town population is 16,418 and the number of cats equals 2,313.

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2 years ago

Multiply the binomials (4x+2)(5x+1) *

strojnjashka [21]

The answer is 20x^2 + 14x + 2

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3 years ago

What is 75.26 rounded to the nearest whole number?

RideAnS [48]

Answer:

Step-by-step explanation:

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3 years ago