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2 years ago

What number in standard form represents one thousand millions

Mathematics

2 answers:

ch4aika [34]2 years ago

6 0

Answer:

1,000,000,000 ( I looked it up)

Step-by-step explanation:

DochEvi [55]2 years ago

4 0

1 × $10^{9}$

one thousand million = 1, 000, 000, 000 = 1 × $10^{9}$ in standard form

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Leno4ka [110]

Answer:

The 4th answer, at the bottom.

Step-by-step explanation:

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The second answer is also proportional, because the ratios are equivalent.

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The fourth answer isn't proportional, because the ratios aren't equivalent.

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2 years ago

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3 years ago

2. Flying to Kampala with a tailwind a plane averaged 158 km/h . On the return trip the plane only averaged 112 km/h while flyin

stiv31 [10]

Answer:

Speed of plane in still air = 135 km/h

Speed of wind = 23 km/h

Step-by-step explanation:

Given that:

Speed of plane with the wind = 158km/h

Speed of plane against the wind = 112km/h

Let,

x be the speed of plane

y be the speed of wind

According to given statement;

x+y = 158 Eqn 1

x-y = 112 Eqn 2

Adding Eqn 1 and 2

$x+y+x-y=158+112\\2x = 170\\\frac{2x}{2}=\frac{270}{2}\\x=135$

Putting x = 135 in Eqn 1

135+y = 158

y = 158-135

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Hence,

Speed of plane in still air = 135 km/h

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3 years ago

Where does the line through (1, 0, 1) and (4, −3, 3) intersect the plane x + y + z = 6?

Irina-Kira [14]

Parametrically for real t the line is

$(x,y,z) = (1-t)(1,0,1) + t(4,-3,3)$

$(x,y,z) = (1,0,1) + t(4-1,-3-0,3-1)$

$(x,y,z) = (1,0,1) + t(3,-3,2)$

That's three equations; we substitute into

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$(1+3t)+(0-3t) + ( 1+2t)=6$

$2t=4$

$t=2$

$(x,y,z) = (1,0,1) + 2(3,-3,2) = (7,-6,5)$

The intersection is a single point (7,-6,5).

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2 years ago