All categories

2 years ago

Help plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 10 points

Mathematics

2 answers:

lys-0071 [83]2 years ago

7 0

$\large\boxed{\tt Answer:~2\pi ~or~around~6.283~units}$

$\tt Step-by-step~explanation:$

The equation for finding the circumference of a circle:

If the radius of this circle is 1, then that means the diameter is 2. We multiply 2 by π to get our answer: 2π or approximately 6.283.

algol132 years ago

6 0

6.283 is the correct answer :)

You might be interested in

Points A, B, C and D have coordinates A(5, 7), B(7, 1), C(17, m) and D(−1, 3). If line

STatiana [176]

Answer:

Step-by-step explanation:

I used a graph

6 0

2 years ago

Read 2 more answers

Make x the subject of y=3x-2

zimovet [89]

Answer:

To make x the subject of the equation means to solve the equation for x (get x by itself on one side). We do the order of operations in reverse, because we are using inverse operations. First, add the 2 to both sides (to keep the equation “balanced” we must do the same thing to both sides). y+2=3x. Then divide both sides of the equation by 3 (or multiply both sides by 1/3.

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

1 , 3 , 6 , 10 , 15

Margarita [4]

As we can see that common difference is increasing to one more digit after every term

so it means

a21 = 231

5 0

3 years ago

Read 2 more answers

Adrian purchases six tubes of paint and three paint brushes at a craft store each tube of paint cost $2.50 each paint brush cost

lesantik [10]

Answer:

The total amount of money pays by Adrian is $14.5 .

Step-by-step explanation:

As given

Adrian purchases six tubes of paint and three paint brushes at a craft store.

Each tube of paint cost $2.50 each paint brush cost $0.50 .

Total cost of the 6 tubes of paints and 3 paint brushes = 6 × Cost of each tube of paint + 3 × Cost of each paint brush cost .

Putting the values in the above

Total cost of the 6 tubes of paints and 3 paint brushes = 6 × 2.50 + 0.50 × 3

= 15 + 1.5

= $16.5

As given

Adrian has a coupon for $2 of his purchase .

Total amount money pay by Adrian = Total cost of the 6 tubes of paints and 3 paint brushes - Coupon cost

Putting the values in the above

= $16.5 - $2

= $ 14.5

Therefore the total amount of money pays by Adrian is $14.5 .

4 0

3 years ago

It is known that 25% of inhabitants of a community favour a political party A.

Keith_Richards [23]

Answer:

i) $P(X=2)=(20C2)(0.25)^2 (1-0.25)^{20-2}=0.0669$

ii) $P(X=0)=(20C0)(0.25)^0 (1-0.25)^{20-0}=0.00317$

$P(X=1)=(20C1)(0.25)^1 (1-0.25)^{20-1}=0.0211$

$P(X=2)=(20C2)(0.25)^2 (1-0.25)^{20-2}=0.0669$

And replacing we got:

$P(X \geq 3) = 1- [0.00317+0.0211+0.0669]= 0.90883$

iii) $P(X$

Step-by-step explanation:

Let X the random variable of interest "number of inhabitants of a community favour a political party', on this case we now that:

$X \sim Binom(n=20, p=0.25)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

Part i

We want this probability:

$P(X=2)=(20C2)(0.25)^2 (1-0.25)^{20-2}=0.0669$

Part ii

We want this probability:

$P(X\geq 3)$

And we can use the complement rule and we have:

$P(X\geq 3) = 1-P(X$

And if we find the individual probabilites we got:

$P(X=0)=(20C0)(0.25)^0 (1-0.25)^{20-0}=0.00317$

$P(X=1)=(20C1)(0.25)^1 (1-0.25)^{20-1}=0.0211$

$P(X=2)=(20C2)(0.25)^2 (1-0.25)^{20-2}=0.0669$

And replacing we got:

$P(X \geq 3) = 1- [0.00317+0.0211+0.0669]= 0.90883$

Part iii

We want this probability:

$P(X$

And replacing we got:

$P(X$

6 0

3 years ago