Foram encontradas 50 questões.
Uma moeda perfeitamente simétrica e homogênea é lançada 3 vezes. Qual é a probabilidade de obtenção de faces iguais nos 3 lançamentos considerando C para indicação de cara e W para indicação de coroa?
Provas
Observe a função f(x) abaixo:
Considera-se que \( f(x) = \begin{cases} k, \ se \ 3 \le x \le 7 \\ 0, caso \ contrário. \end{cases} \)
Analise as afirmativas abaixo e assinale a opção correta.
I - O valor de k para que f(x) seja uma função de densidade de probabilidade de uma variável aleatória x é 1/4.
II - E(x) = 4
III - Var (x) = 71/6
Provas
A função de densidade de \( X \) é dada por \( f(x) = f(n) = \begin{cases} a + bx^2, 0 \le x \le 1 \\ 0, caso \ contrário \end{cases} \). Se \( E[X] = { \large 3 \over 5} \), determine os valores de \( a \) e \( b \),respectivamente, e assinale a opção correta.
Provas
About the distress call, analyse the sentences below write true (T) or false (F) and mark the correct option.
I - All other calls are less important than the distress message.
II - A few calls are more important than the distress message.
III - Any transmission is more important than the distress call.
IV - No transmission is as important as the distress message.
V - A lot of calls are not more important than the distress one.
Provas
The Controlling Station is responsible for establishing contact on the working channel. In the previous sentence, the -ing forms are respectively used as:
Provas
Which word below does have in common with the word lenses the rule for plural?
Provas
Read Text II . Answer the question.
Text II - Distress Message and Call
The distress call has absolute priority over all other transmissions. All stations that hear it will immediately cease any transmission capable of interfering with distress traffic and will continue to listen on the frequency used for distress call. The distress message will be repeated at intervals by the vessel in distress until an answer is received or until it is no longer feasible to continue. The intervals between repetitions of the distress message will be sufficiently long to allow time for stations, which have received the message, to reply.
Taken from Maritime and IMO SMCP 2001. Rijeka, 2003
Switching to a working channel is normally carried out under the guidance of the Coast Station. What does the word in bold mean?
Provas
Read text I. Answer question below based on text I.
Text I - The enduring appeal of Aviator sunglasses
By Katya Foreman
8 July 2015
Sometimes a name becomes so well-known we forget its original meaning. A case in point is Ray-Ban, which was behind the world's first aviator sunglasses, conceived in the 1930s to ban rays from the eyes of US Air Force pilots. Though marketed under the Ray-Ban banner, it was the parent company brand, Bausch & Lomb - a US firm specialising in eye health products that came up with the invention, Developed as an alternative to the fur-lined goggles worn by pilots in the early 20th-Century - which definitely didn't perform technically - aviator sunglasses became the perfect solution to protect a pilot's eyes against the elements, help to avoid headaches and to combat decreased visibility caused by the blinding glare of the sun at high altitude.
The aviator was not to remain confined to the cockpit, however. Fitted with green lenses that could cut out the glare without obscuring vision, the first examples, which went on sale to the public in 1937, featured a plastic frame in the now-classic teardrop shape (echoing the form of pilot's goggles), but was remodelled with a metal frame the following year and rebranded as the Ray-Ban Aviator.
Adapted from <http://www.bbc.com/culture/story/20150708-the-enduring-
appeal- of-aviator-sunglasses>
“Fitted with green lenses that could cut out the glare without obscuring vision, the first examples, which went on sale to the public in 1937...”. What does the term in bold refer to?
Provas
Read text I. Answer question below based on text I.
Text I - The enduring appeal of Aviator sunglasses
By Katya Foreman
8 July 2015
Sometimes a name becomes so well-known we forget its original meaning. A case in point is Ray-Ban, which was behind the world's first aviator sunglasses, conceived in the 1930s to ban rays from the eyes of US Air Force pilots. Though marketed under the Ray-Ban banner, it was the parent company brand, Bausch & Lomb - a US firm specialising in eye health products that came up with the invention, Developed as an alternative to the fur-lined goggles worn by pilots in the early 20th-Century - which definitely didn't perform technically - aviator sunglasses became the perfect solution to protect a pilot's eyes against the elements, help to avoid headaches and to combat decreased visibility caused by the blinding glare of the sun at high altitude.
The aviator was not to remain confined to the cockpit, however. Fitted with green lenses that could cut out the glare without obscuring vision, the first examples, which went on sale to the public in 1937, featured a plastic frame in the now-classic teardrop shape (echoing the form of pilot's goggles), but was remodelled with a metal frame the following year and rebranded as the Ray-Ban Aviator.
Adapted from <http://www.bbc.com/culture/story/20150708-the-enduring-
appeal- of-aviator-sunglasses>
What is correct to say about the first paragraph?
Provas
Read text I. Answer question below based on text I.
Text I - The enduring appeal of Aviator sunglasses
By Katya Foreman
8 July 2015
Sometimes a name becomes so well-known we forget its original meaning. A case in point is Ray-Ban, which was behind the world's first aviator sunglasses, conceived in the 1930s to ban rays from the eyes of US Air Force pilots. Though marketed under the Ray-Ban banner, it was the parent company brand, Bausch & Lomb - a US firm specialising in eye health products that came up with the invention, Developed as an alternative to the fur-lined goggles worn by pilots in the early 20th-Century - which definitely didn't perform technically - aviator sunglasses became the perfect solution to protect a pilot's eyes against the elements, help to avoid headaches and to combat decreased visibility caused by the blinding glare of the sun at high altitude.
The aviator was not to remain confined to the cockpit, however. Fitted with green lenses that could cut out the glare without obscuring vision, the first examples, which went on sale to the public in 1937, featured a plastic frame in the now-classic teardrop shape (echoing the form of pilot's goggles), but was remodelled with a metal frame the following year and rebranded as the Ray-Ban Aviator.
Adapted from <http://www.bbc.com/culture/story/20150708-the-enduring-
appeal- of-aviator-sunglasses>
Based on the text, mark the option that completes the following sentence: If it had not been on sale to the public in 1937,
Provas
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