2 years ago

30000 is blank times as much as 30

Mathematics

2 answers:

Sindrei [870]2 years ago

8 0

1000 is the answer !

NARA [144]2 years ago

4 0

30000 is exactly 1000 as much as 30

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The mass of a an atom of helium is 6.65 x 10^−24. Use scientific notation to express the mass of 250 helium atoms.

melisa1 [442]

1.6625 x 10−21

mass of one helium atom x 250 
Express 250 as 2.50.
(6.65 x 10−24)(2.50 x 102)
16.625 x 10−22

5 0

2 years ago

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Factor 16x^2 + 49. Check your work.

Shtirlitz [24]

Answer:

$16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

Step-by-step explanation:

Given : Expression $16x^2+49$

To find : Factor the expression ?

Solution :

The given expression is a quadratic function $y=ax^2+bx+c$ the solution is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

On comparing with general form,

a=16, b=0, c=49

Substitute in the formula,

$x=\frac{-0\pm\sqrt{0^2-4(16)(49)}}{2(16)}$

$x=\frac{\pm\sqrt{-3136}}{32}$

$x=\frac{\pm56i}{32}$

$x=\frac{56i}{32},\frac{-56i}{32}$

$x=\frac{7i}{4},\frac{-7i}{4}$

Factors are $(x-\frac{7i}{4}),(x+\frac{7i}{4})$

Therefore, $16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

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3 years ago

Benji and Joel are raising money for their class trip by selling gift wrapping paper. Benji raises $15 by selling 4 rolls of red

Ahat [919]

The price for red paper = 1.25
the price for foil = 2.5

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2 years ago

Show √7 , √5 on a number line. please hurry up my cissy and oppa

tankabanditka [31]

Answer:

Draw the number line like in the picture.

Step-by-step explanation:

√5 is about 2.236, meaning it's kind of close to 2.25.

√7 is about 2.646, meaning it's very close to 2.625.

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2 years ago

Can I get some more help

NikAS [45]

Answer: C

Explanation:

Sqrt 9 x sqrt 4 = sqrt 9 x 4

6 0

3 years ago

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