Answer:
Explanation:
The given parameters are:
Required
Determine the curved surface area of the big cone
The volume of a cone is:
For the big cone:
Where
R = radius of the big cone and H = height of the big cone
For the small cone:
Where
r = radius of the small cone and H = height of the small cone
Because both cones are similar, then:
and
Substitute values for Vbig and Vsmall
Recall that:
So, we have:
Take cube roots of both sides
![\sqrt[3]{\frac{1715}{1080}} = \frac{R}{r}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B%5Cfrac%7B1715%7D%7B1080%7D%7D%20%3D%20%5Cfrac%7BR%7D%7Br%7D)
Factorize
![\sqrt[3]{\frac{343*5}{216*5}} = \frac{R}{r}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B%5Cfrac%7B343%2A5%7D%7B216%2A5%7D%7D%20%3D%20%5Cfrac%7BR%7D%7Br%7D)
![\sqrt[3]{\frac{343}{216}} = \frac{R}{r}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B%5Cfrac%7B343%7D%7B216%7D%7D%20%3D%20%5Cfrac%7BR%7D%7Br%7D)
The curved surface area is calculated as:
Where
For the big cone:
For the small cone
Because both cones are similar, then:
and
This gives:
Recall that:
So, we have:
Make 
the subject
Substitute values for 
and 
<em>Hence, the curved surface area of the big cone is 1143.33cm^2</em>
Answer B (Data storage system)
The type of infiltration technique used here is phishing. Phishing is a form of social engineering attack that is often used to obtain user information such as login and credit card information.
Phishing is a type of social engineering in which an attacker delivers a false (e.g. fake, fake, or other deceptive) communication designed to trick a person into providing critical information to the attacker, or to install malicious software, such as ransomware, on the victim. infrastructure.
Phishing attacks are becoming more sophisticated and often transparently mirror the website being attacked, allowing the attacker to track everything the victim is doing there and bypass other security barriers with them.
By far the most common attack by hackers as of 2020, according to the FBI Internet Crime Complaint Center, which records more phishing incidents than any other type of cybercrime combined.
To know more about phishing click here:
brainly.com/question/24156548
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Cognitive surplus results when leisure time and available tools allow us to engage in creative acts. It is a term that was introduced by Clay Shirky which pertains to the synthesis of the excess of people's energy, time and creativity leading to productivity sharing and creation.
The number of smartphone users is forcast to grow from 2.1 billion in 2016 to around 2.5 billion in 2019, with smartphone penetration rates increasing as well.over 36% of the worlds population is projected to use a smartphone by 2018, thats up from about 10% in 2011
