Answer:
The answer is 1.142
Step-by-step explanation:
and by the way you could have just used a calculator:)
To find out which cake is better for the price, we need to multiply the cake amounts by how many cakes of that kind we need. You need 5 20cm cakes, so we multiply 5 by the price of the 20cm cake (13.50) to get $67.50. You need 3 25cm cakes, so 3 x 18.75 = 56.25.
20cm cake: $67.50
25cm cake: $56.25
Answer: The 25cm cake is cheaper for more people.
All you have to do is divide the volume of the container (43.875) by 5 (length) and 3.9 (width) because the formula for the volume of a rectangular prism is V=lwh. So the answer/height of the storage container is 2.25 meters
The first step for finding out if the expression provided is equivalent to

is to reduce the fraction with

.

Now reduce the fraction with y.

Finally,, reduce the fraction with 8 to get your final answer.

Let me know if you have any further questions.
:)
Answer:
The probability that the whole package is uppgraded in less then 12 minutes is 0,1271
Step-by-step explanation:
The mean distribution for the length of the installation (in seconds) of the programs will be denoted by X. Using the Central Limit Theorem, we can assume that X is normal (it will be pretty close). The mean of X is 15 and the variance is 15, hence, the standard deviation is √15 = 3.873.
We want to find the probability that the full installation process takes less than 12 minutes = 720 seconds. Then, in average, each program should take less than 720/68 = 10.5882 seconds to install. Hence, we want to find the probability of X being less than 10.5882. For that, we will take W, the standariation of X, given by the following formula

We will work with
, the cummulative distribution function of the standard Normal variable W. The values of
can be found in the attached file.

Since the density function of a standard normal random variable is symmetrical, then 
Therefore, the probability that the whole package is uppgraded in less then 12 minutes is 0,1271.