Em uma pirâmide regular, de base hexagonal, o apótema da base mede 1cm. Se a altura da pirâmide mede o dobro da medida da diagonal de um cubo de 8cm 3 de volume, então a razão entre a área lateral da pirâmide e a área total do cubo vale
250 questões com gabarito verificado e explicação por IA. Mostrando página 3 de 9.
Em uma pirâmide regular, de base hexagonal, o apótema da base mede 1cm. Se a altura da pirâmide mede o dobro da medida da diagonal de um cubo de 8cm 3 de volume, então a razão entre a área lateral da pirâmide e a área total do cubo vale
According to the text above, what are the key elements for the success of a warfare operation?
O gráfico que melhor representa a função real é
Which sequence best completes the text below? When we go out on weekends, I don' t mind ______________ (1) . I enjoy ____________(2) by car because it is more comfortable and I can't resist (3) to take photos. However, I avoid (4) at night as I prefer not _______________(5) the risk of _______________(6) on the wheel.
No sistema cartesiano abaixo está esboçada uma porção do gráfico de uma função y(x)=log2 (x+a) restrita ao intervalo [2,8], ? ? ?+ ? . Se y(2)= 2, então o valor da área hachurada é
Uma das raízes da equação z 4 =8+8?3 i também é raiz da equação
Considere a matriz com elementos em C. Sendo , então a forma trigonométrica de é
Observe the sign below. What is NOT true according to the sign?
Which of the alternatives below completes the sentence correctly? "There ____________(1) people on the wait list in the past few years whose interest level was inappropriate, " says Meehan.
Sejam f e g funções reais definidas por f(x)=2sen 2 x+.cosx e g(x)=k+cos2x, k??. Se então a soma das soluções da equação f(x) = g(x) no intervalo
é
Os coeficientes dos três primeiros termos do desenvolvimento de coincidem com os três primeiros termos de uma progressão aritmética (PA) . O valor do 11° termo da PA é
Analyse the sentences below. Which is the correct sentence?
Seja ? a função real, de variável real, definida por f(x)= 3 ?x 3 ?x 2 . Podemos afirmar que
Read the text below. Why has the US government changed credit card regulations? NEW CREDIT CARD LIMITATIONS IN THE US Credit card companies in the US will soon be bound by new restrictions on their ability to charge fees, or raise interest rates on existing borrowings. The bill is designed to protect credit card users from unexpected fees or increases to their interest rates. The US government has been concerned to tighten its regulation of the banking system in the light of the credit crunch and banking crisis. "This cements a victory for every American consumer who has ever suffered at the hands of the credit card industry, " said Senator Christopher Dodd, chairman of the Senate banking committee. Americans currently owe nearly $1 trillion on their credit cards. The US government has been concerned to tighten its regulation of the banking system in the light of the credit crunch and banking crisis. (Adapted from http: //news.bbc.co.uk/2/hi/business/ 8063108.stm) The US government has changed credit card regulations...
A reta r tangente à curva de equação x??xy+y=1, no ponto P =(x,y ), é paralela ao eixo das abscissas. Pode?se afirmar que o ponto P também pertence à reta de equação
Which sequence best completes the sentence below? People (1)________________ (2)__________________ hours and hours (3)_____________ video games (4)___________________ the same personality traits (5)____________________ people with Asperger's syndrome, a form of autism.
Considere a função f , de variável real x, definida por f(x)=sen 6 x+cos 6 x+m(sen 4 x), onde m ? ? é um valor que torna fconstante. A equação da circunferência tangente ao eixo y, cujo centro está no ponto de interseção das retas ?2mx+2y?5=0 é
Considering the text, what does the word "dwindling" mean in this extract? " (...) countries develop a nuclear threat to defend and secure dwindling food, water and energy supplies."
No universo U = ?+, o conjunto?solução da inequação é
Which sequence best completes the text below? A Special Easter Night Once upon a time there (1)_____________________ little white bunnies whose occupation (2)__________________ to
distribute coloured, painted and flower-drawn eggs on Easter Eve night, in a village of poor people. Sometimes they also (3)_____________________ them different items they (4)________________________ , like clothes and food. (http:llwww.ncsu.edulmidlink/wsleaster.htm)
Na figura abaixo ABC é um triângulo equilátero de lado 2r e são arcos de circunferência de raio r. Os segmentos são perpendiculares ao segmento é uma semicircunferência de centro em C. Se e a soma das áreas hachuradas mede então o valor de r é
Read the text and check the statements below. REAL BLUE SKY RESEARCH Just where in the world is the bluest sky? Expedia wanted to know for its "Blue Sky Explorer" project. They asked NPL to develop a blue sky standard and some cheap equipment to measure it. Their solution was to use cheap light-emitting
diodes as the light standard, rather than the typical expensive noble gas lamps, and the belt-and-braces device was calibrated against an international "colourimetry" standard. The result? Rio de Janeiro came out on top, followed by the Bay of Islands in New Zealand and Uluru in Australia. Unsurprisingly the UK did not figure in strongly in the top 10, but Castell Dinas Bran in Wales came in at number nine. b (Adapted fromhttp: / /news.bbc.co.uk/2/hi/science/nature/8059502.stm) Which is the best alternative considering some of the statements are true ( T ) and others are false ( F ) ? I- The research is about the colour of the sky in different parts of the planet. II- Expedia used a previous blue sky standard in the research. III- The lamps that are currently used in the measurement were replaced by cheap ones. IV- NPL adjusted the device to use an international "colourimentry" standard. V- Rio de Janeiro and New Zealand got first rank in the Research while Australia came in second. VI- It was a surprise that the UK did not figure in strongly in the top 10. The best alternative is
Seja r a reta que contém: (i) o ponto de interseção das retas (ii) o ponto médio do segmento de extremos A(1,0,?1) e B(3, ?4, 3) . As equações de r são
Which of the alternatives below completes the sentence correctly? (1 ) have you known her?
O trapézio retângulo ABCDA, representado na figura abaixo, faz uma rotação completa em torno do eixo l, gerando um sólido S. Sabendo que os segmentos AB e BC e o ângulo ? têm por medida 8cm, 8cm e 30° , respectivamente, e que . o volume de S vale o dobro do volume de uma esfera de raio R, pode?se concluir que o comprimento de R, em cm, é
Which of the alternatives below completes the sentence correctly? There are no figures for__________________ (1) of the applicants successfully get off waiting lists. It varies since it depends on the strength of the application pool and whether the fully accepted students decide to attend or go elsewhere.
Observe the sign below. Who can use the seats?
Os ângulos ? e ? na figura abaixo são tais que e a equação da reta r é y = x?2 . Então tg ( ? + ? ) vale
Sejam a e b constantes reais positivas, a?b. Se x é uma variável real, então é