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3 years ago

Sarah is making a cake using a recipe that requires

Mathematics

1 answer:

Alex73 [517]3 years ago

3 0

Answer:

4/1

because 3+1 is 4 then put 1 so

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A right cylinder has a radius of 3 and a height of 12. What is its surface area? O A. 72 units O B. 90 units O c. 45rt units O D

Yuliya22 [10]

Answer:

$A=72\pi\ units^2$

Step-by-step explanation:

Given that,

The radius of the cylinder, r = 3

Height of the cylinder, h = 12

We need to find the surface area of the cylinder. The formula for the surface area of a cylindrical object is given by :

$A=2\pi rh\\\\=2\times \pi\times 3\times 12\\\\=72\pi\ units^2$

So, the surface area of the cylinder is equal to $72\pi\ units^2$ .

7 0

3 years ago

The mean number of daily surgeries at a local hospital is 6.2. Assume that surgeries are random, independent events. (a) The cou

Wewaii [24]

Answer:

1) Poisson distribution with mean 6.2 and standard deviation 2.49.

2) 0.0536

Step-by-step explanation:

We are given the following information in the question:

Mean of daily surgeries = 6.2

a) The count of daily surgeries can be treated as a Poisson distribution.

The Poisson distribution is the discrete probability distribution of the number of events occurring in a given time period, given the average number of times the event occurs over that time period.
The variance of Poisson distribution is equal to the mean of Poisson distribution.

Variance = 6.2

Standard deviation = $\sqrt{6.2} = 2.49$

a) Poisson distribution with mean 6.2 and standard deviation 2.49.

2) P( 2 or less surgeries)

Formula:

$P(X =k) = \displaystyle\frac{\lambda^k e^{-\lambda}}{k!}\\\\ \lambda \text{ is the mean of the distribution}$

$P( x \leq 2) = P(x =0) + P(x=1) + P(x=2)\\\\= \displaystyle\frac{6.2^0 e^{-6.2}}{0!} + \displaystyle\frac{6.2^1 e^{-6.2}}{1!} + \displaystyle\frac{6.2^2 e^{-6.2}}{2!}\\\\ = 0.00203+ 0.01259 + 0.03900\\\\= 0.0536 = 5.36\%$

4 0

4 years ago

Which term is used to describe a number that makes a statement true?

frosja888 [35]

That is called the solution

factor is like 2 and 3 and 9 are factors of 18 because 2*9=18 and 3*6=18

inequality is like 3<4

product is multiplcation so like product of x and y is x times y

answer is solution

8 0

3 years ago

~Giving brainliest!~

ruslelena [56]

Answer:

a) = 4/9 b) -20/21

c) -77/6 d) 39/22

Step-by-step explanation:

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2 years ago

A marathon runner travels 7/4 of a mile in 1/4 hour. What is the runner's unit rate?

stira [4]

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3 0

3 years ago

Read 2 more answers