a submarine is 58.8 m from a whale. the sub sends out a sonar ping to locate the whale. the speed sound underwater is 1520 m/s. how much time does it take for the sound wave to travel to the whale and back?(unit=s)

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

Write the following as a base and exponent

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)