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polet [3.4K]
3 years ago
7

Find the circumference of a circle with radius = 30 mm.

Mathematics
2 answers:
3241004551 [841]3 years ago
8 0

Answer:

r= 15

Step-by-step explanation:

OLEGan [10]3 years ago
7 0

188.4mm you do 60(3.14)

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Use the number line below. Which fraction is equivalent to
tankabanditka [31]
B easy simplify 3/6 and it’s 1/2 half of 6 is 3 so B is the answer
3 0
3 years ago
Read 2 more answers
One of ten different prizes was randomly put into each box of a cereal. If a family decided to buy this cereal until it obtained
Reptile [31]

Answer:

29.29

Step-by-step explanation:

The first trial among a distribution of independent trials with a constant success probability follows a geometric probability.

The expected value of a negative binomial is the reciprocal of its success probability <em>p.</em>

<em>E(X)=</em>1/<em>p</em>

At the first draw, we only selected one of the 10 prizes and so 1 draw gives a success

<em>E(X)=</em>1/<em>p</em>

<em>E(X1)</em>=1

After the first prize is drawn, we are interested in the first time (success), that we draw another prize that is different (<em>p</em>=9/10)

E(X2)=1/9÷10

E(X2)= 10/9

After the first prizes have being drawn, we now interested in the first time success that we draw a different prize from the first 2

E(X3)=1/8÷10

E(X3)=10/8

E(X3)=5/4

After the first three prizes have been drawn, we are now interested in the success of a first time draw for the 4th different prize

E(X4)=1/7÷10

E(X4)=10/7

Fifth different prize

E(X5)=1/6÷10

E(X5)=10/6

E(X5)=5/3

Sixth different prize

E(X6)=1/5÷10

E(X6)=10/5

E(X6)=2

Seventh different prize

E(X7)=1/4÷10

E(X7)=10/4

E(X7)=5/2

Eighth different prize

E(X8)=1/3÷10

E(X8)=10/3

Ninth different prize

E(X9)=1/2÷10

E(X9)=10/2

E(X9)=5

After the 9 different prizes have been drawn, we are interested in the first time we will draw the tenth different prize

E(X10)=1/1÷10

E(X10)=10

Add up all corresponding values;

<em>E(X)=</em>E(X1)+E(X2)+E(X3)+E(X4)+E(X5)+E(X6)+E(X7)+E(X8)+E(X9)+E(X10)

<em>E(X)=</em>1+10/9+5/4+10/7+5/3+2+5/2+10/3+5+10

<em>E(X)</em>= 29.29

Note: Those values in <em>E(X), </em>should be written the way it will in standard algebra ie they should be small.

4 0
3 years ago
I need help with this quick <br> Plz show all the work plz
Naddika [18.5K]

Answer:

Step-by-step explanation:

4 0
2 years ago
How do I solve 5x - 4 = -19
ira [324]
Undo what has been done to the variable. That means to do the opposite done to the variable.
5x-4=-19
+4=+4
5x=-15
5 is being multiplied to the variable so you divide it from both sides.
x=-3
7 0
3 years ago
Thích of the following is a COMPLETE list of all possible Rat<br> f(x) = 2x3 + 5x2 - 9x + 5
Korvikt [17]

Answer:

1.  Reduce  3x2-6x-240   to    x^2 - 2x - 80

2.  Use " ^ " to indicate exponentiation

3.  Factor  x^2 - 2x - 80 using completing the

    x^2 - 2x + 1^2 - 1^2 - 80

        (x+1)^2 - 1  - 80

         (x+1)^2 - 81

         (x+1)^2 - 9^2  = (x+1-9)(x+1 +9), or (x-8)(x+10)

Final answer, with all factors shown:      3(x-8)(x+10)

Step-by-step explanation:

3 0
3 years ago
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