6. going to ocean city, john drives 40 mph for 2 hours and 70 mph for 1 hour. his brother dave leaves
30 minutes later. how fast does dave need to steadily drive to get to ocean city at the same time as john?

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.