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3 years ago

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Box 1 contains 1400 bulbs of which 15% are defective. Box 2 contains 500 bulbs of which 9% are defective. Two bulbs are picked f

rom a randomly selected box with equal probability for both Box 1 and Box 2. (Both bulbs are from the same box.)

1 answer:

Vikki [24]3 years ago

7 0

Answer:

4444

Step-by-step explanation:

245890iuhg

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Factorise fully<br>5ac - 10a2b + 30a

irga5000 [103]

Answer:

5a(c-2ab+6)

Step-by-step explanation:

5a is in all three, then factorise

5 0

3 years ago

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The average density of the material in intergalactic space is approximately 2.5 × 10–27 kg/m3. what is the volume of a lead samp

Lesechka [4]

Answer:

e. $1.8\times 10^{-6}m^3$

Step-by-step explanation:

It is given that,

The density of intergalactic space material is $2.5 \times 10^{-27}$ kg per cubic meter.

And the volume of intergalactic space material is $8.0\times 10^{24} m^3$

So the mass of that much intergalactic space material is,

$m= \rho\times v$ , where 'm' is the mass, and 'v' is the volume.

Putting the values we get,

$m=2.5 \times 10^{-27}\times 8.0 \times 10^{24}$

$m=20\times 10^{(-27+24)}=20\times 10^{-3} kg$

It is also given that the mass of lead is the same as the mass of the intergalactic space material. Therefore, the mass of lead is $20 \times 10^{-3}=2 \times 10^{-2}kg$

So the volume of lead is,

$v=\frac{m}{\rho} =\frac{2 \times 10^{-2}}{11300} = 0.00000177 m^3$

$v=1.77 \times 10^{-6}=1.8\times 10^{-6}m^3$

So the volume of lead is $v=1.8\times 10^{-6}m^3$ .

3 0

3 years ago

Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction

tiny-mole [99]

$\frac{7}{24}$ ÷ $\frac{35}{48}$
Multiply $\frac{7}{24}$ by the reciprocal of $\frac{35}{48}$ , which is $\frac{48}{35}$

= $\frac{7}{24}$ × $\frac{48}{35}$
= $\frac{336}{840}$

We can simplify it further:
The greatest common factor here is 168
$\frac{336/168}{840/168}$

= $\frac{2}{5}$

4 0

3 years ago

What is the solution for these lines<br> (line a ) x+2y=4<br> (line b ) 3x-2y=4

Amanda [17]

X+2y=4
3x-2y=4
4x=8
x=2
2+2y=4
2y=2
y=1

y=1
x=2

Hope this helps :)

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3 years ago

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pete took out a 48 month loan for $5,200 to buy a used mortorcycle. if the simple interest rate is 8.5 % how much will he have p

alexdok [17]

Answer:he would have paid $6,968.00

Step-by-step explanation:

5200x0.085=442. 42/12=4. 4x422=1768

1768+5200=6968

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3 years ago

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