a van moves at a constant speed of 40 miles per hour. how long will it take to travel a distance of 100 miles?

2 hours

Step-by-step explanation:

We know the van moves at 40 miles per hour.

In 2 hours of driving, the van reaches 80 miles.

We have to get to 100 miles driven.

Now, there are 20 miles left to 100.

Let's split the number 40 driven in one hour to 20 miles driven in 30 minutes.

Now, we have 2 and 1/2 hours. It is the answer.

Well, to start this off- you have three journals. Each one weighs 380 grams. To solve this you have to multiply the weight of each journal with the amount of journals you have. And your answer should be 840