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krok68 [10]
3 years ago
13

Use the next to find the approximate surface area of the cylinder to the nearest square meter.

Mathematics
1 answer:
enot [183]3 years ago
3 0

Answer:

C. 302 m^2

Step-by-step explanation:

2 Base: 2 x (πr²) = 2 x (3.14 x 9) = 56.52

side: 2πrh = 2 x 3.14 x 3 x 13 = 244.92

surface area: 56.52 + 244.92 = 301.44    (≈ 302)

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15 + r as a verbal expression
kodGreya [7K]

Hey there!

<h2>ANSWER: r+15</h2><h2>EXPLANATION:</h2><h2>15+r</h2>

Simplify by flipping.

r+15

Hope this helps!

- TestedHyperr

7 0
3 years ago
Use the fact that the mean of a geometric distribution is μ= 1 p and the variance is σ2= q p2. A daily number lottery chooses th
butalik [34]

Answer:

a). The mean = 1000

     The variance = 999,000

     The standard deviation = 999.4999

b). 1000 times , loss

Step-by-step explanation:

The mean of geometric distribution is given as , $\mu = \frac{1}{p}$

And the variance is given by, $\sigma ^2=\frac{q}{p^2}$

Given : $p=\frac{1}{1000}$

             = 0.001

The formulae of mean and variance are :

$\mu = \frac{1}{p}$

$\sigma ^2=\frac{q}{p^2}$

$\sigma ^2=\frac{1-p}{p^2}$

a). Mean =   $\mu = \frac{1}{p}$

              = $\mu = \frac{1}{0.001}$

              = 1000

  Variance =   $\sigma ^2=\frac{1-p}{p^2}$

                  = $\sigma ^2=\frac{1-0.001}{0.001^2}$

                           = 999,000

   The standard deviation is determined by the root of the variance.

    $\sigma = \sqrt{\sigma^2}$

        = $\sqrt{999,000}$ = 999.4999

b). We expect to have play lottery 1000  times to win, because the mean in part (a) is 1000.

When we win the profit is 500 - 1 = 499

When we lose, the profit is -1

Expected value of the mean μ is the summation of a product of each of the possibility x with the probability P(x).

$\mu=\Sigma\ x\ P(x)= 499 \times 0.001+(-1) \times (1-0.001)$

  = $ 0.50

Since the answer is negative, we are expected to make a loss.

4 0
3 years ago
The length of a rectangle is 3 units greater than its width. If the width is w, what expression gives the perimeter of the recta
Andru [333]

Step-by-step explanation:

let width be "w"

given,length of rectangle is 3 units greater than its width

length= w+ 3

perimeter of rectangle= 2( l+ b)

= 2[( w+3)+ w]

= 2(w to the power of 2 + 3w)

= 2w to the power of 2 + 6w

is the answer

3 0
3 years ago
Let f={(1,2),(2,3),(5,6),(7,8) evaluate f(2)and f(5)?​
Flauer [41]

Given:

f=\{(1,2),(2,3),(5,6),(7,8)\}

To find:

The values of f(2) and f(5).

Solution:

If an ordered pair (x,y) is in the function f, then f(x)=y.

In the given set of ordered pairs one ordered pair is (2,3). So, by using the above definition, we get

f(2)=3

In the given set of ordered pairs one ordered pair is (5,6). So, by using the above definition, we get

f(5)=6

Therefore, the value of f(2) is 3 and the value of f(5) is 6.

5 0
3 years ago
Solve for K <br><br> 8(10-K) = 2k<br><br><br> K=?
maks197457 [2]

8(10-K) = 2k

mutiply the bracket by 8

(8)(10)= 80

(8)(-k)= -8k

80-8k= 2k

move -8k to the other side

sign changes from -8k to +8k

80-8k+8k= 2k+8k

80= 2k+8k

80= 10k

divide by 10 for both sides

80/10= 10k/10

k= 8

Answer: k= 8

7 0
3 years ago
Read 2 more answers
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