Numa certa experiência, há três acontecimentos elementares, , e , tais que: e são equiprováveis e () =

().
Qual é a probabilidade do acontecimento ( ∪ )?

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}