A figura mostra a visão aérea de um parque onde existem ruas que podem ser utilizadas para corridas e caminhadas. Nesse parque há uma pista ABCA, em forma de um triângulo retângulo, em que uma pessoa corre dando voltas sucessivas. Considerando que as medidas dos catetos AB e BC são, respectivamente, 60 m e 80 m, e que o tempo cronometrado para dar uma volta no trecho ABCA foi de 1 minuto, determine:

a) a medida do segmento AC;

b) a velocidade da média desenvolvida pela pessoa nesse percurso.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2