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frez [133]
3 years ago
13

The density of zinc is 7130 kg/m3 . (b) Work out the mass of 5 m3 of zinc.

Mathematics
1 answer:
const2013 [10]3 years ago
7 0

Answer:

Uhdhdb

Step-by-step explanation:

Jsjddj hdhdhhdb

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Find the sum of the following series. Round to the nearest hundredth if necessary,
Aneli [31]

Answer:

sum =   \frac{a( {r}^{n - 1} )}{r - 1}   \\  : but \: l = a( {r}^{n - 1} ) \\ 49152 = 3( {2}^{n - 1} ) \\ 16384 =  {2}^{n - 1}  \\  {2}^{n}  = 32768 \\  {2}^{n}  =  {2}^{15}  \\ n = 15 \\  \therefore \: sum =  \frac{3(2 {}^{15 - 1}) }{15 - 1}  \\  =  \frac{49152}{14}  \\  = 3510.9

3 0
3 years ago
The picture shows a barn door:
Hitman42 [59]

Answer:

(D)9 divided by sin 60 degrees

Step-by-step explanation:

From the given figure, using trigonometry

\frac{BC}{AB}=sin60^{{\circ}}

Substituting the given values, we get

\frac{9}{AB}=sin60^{{\circ}}

\frac{9}{sin60^{\circ}}=AB

AB=\frac{9{\times}2}{\sqrt{3}}

AB=\frac{18}{\sqrt{3}}

AB=10.4 feet

Thus, The length of the support AB is 9 divided by sin 60 degrees.

5 0
3 years ago
Read 2 more answers
Please help, im seriously stuck on this
Rasek [7]

Answer:

x=64

Step-by-step explanation:

the shapes are similar

since the difference between 20 and 24 is 4

then you add 4 to 60 and get 64

I don't actually know 100% that this is correct but it makes sense in my head

7 0
3 years ago
What is C in the triangle <br> C=
Alla [95]

Answer:

C = 13

Step-by-step explanation:

A^{2} + B^{2} = C^{2}

5^{2} + 12^{2} = 169

\sqrt{169} = 13

4 0
3 years ago
Read 2 more answers
Suppose there are three balls in a box. On one of the balls is the number 1, on another is the number 2, and on the third is the
quester [9]

Step-by-step explanation:

a) X is a discrete uniform distribution. As the number of outcomes is only 3.

b) sum is at least 4

X ≥ 4

i.e  (1,3) or (2,3)

probability of X ≥ 4 is 2/3

2/3= 0.667

66.7 % is the probability of the outcome to have  a sum at least 4.

c) The 3 likely outcome of X

<em>(1,2) where X ; </em> 1+2=3

<em>(1,3) where X ;</em> 1+3=4

<em>(2,3) where X ;</em>  2+3=5

Mean = 3+4+5/ 3

Mean = 4

Feel free to ask any uncleared step

8 0
3 years ago
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