Information about five planets is shown in the table below. Planet Diameter (km) Mass (kg)
Mercury 4.88 x 10 3.3 * 1023
Jupiter 1.43 x 105 1.898 x 1027
Earth
1.28 x 104 5.97 x 1024
Mars 6.78 x 10 6.42 x 1023
Saturn 1.21 x 10 5.68 x 1026
a) Write down the name of the planet with the greatest mass.
b) Work out the radius of Mercury giving your answer as an ordinary number.
c) Work out the difference between the masses of Jupiter and Saturn.
Q

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?