Charles can do the whole job in an hour, Bill can do 1/2 of the job in an hour, and Bob does 1/3 of the job in an hour. Therefore, they do a total of 1+1/2+1/3=11/6 of the job in an hour, meaning it takes them 6/11 of an hour. This is 6/11*60=360/11 minutes, or approximately 33 minutes.
Answer:
The solution is:

Step-by-step explanation:
The first step to solve this equation is placing everything with the logarithmicto one side of the equality, and everything without the exponential to the other side. So

It already is in the desired format.
Now, we have that, since e and ln are inverse operations

So, we apply the exponential to both sides of the equality


They would need to travel at 57.5 mph. So what I did was took 2100-1755 and got 345. Then I divided that by 6 since they want to get there in 6 hours and I got 57.5 mph.
- 7/20 + -2/5 ? 16 / 20, I'm pretty sure