![paiged2003](/avatars/31936.jpg)
paiged2003
06.10.2019 •
Mathematics
Why do you divide by 60 after calculating the area of the trapezoid (to calculate the distance)? i got 900 but i don’t know why you divide by 60 to get 15 as your answer. ignore the pen marks.
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Ответ:
Step-by-step explanation:
What you are trying to do is a nice way to solve this problem. Without knowing any physics, you are using what math you know to get the answer. You are actually very close to being correct, and you are right. You do have to divide by 60.
Here's why and it is the one bit of physics you have to know.
The speed is km/hour. That word hour is the culprit. Your time is in minutes and you have to get it into hours. In physics, the units have to be consistent.
So ...
b1 = 19 minutes which is 19 min [1 hour / 60 minutes] = 19/60 = 0.31667 hour
b2 = 26 minutes which is 26 min [ 1 hour/60 minutes] = 26/60 = 0.4333 hour
h = 40 km/hour
Area = (0.31667 hour + 0.4333 hour)*40 km/hour /2
Area = 0.75 hour * 40 km/hr //2
Area = 15 km
Ответ:
The statement "visual aids summarize main ideas and key points" is true.
Visual aids can be defined as those things that you can look at includin a film, model, map, or slides, to help you understand something or to remember information.
For instance visual aids may be utilized in order to try to combat or prevent a disease by summarizing the key points and factor to take into account about it.