The shapes are similar and not congruent because one is 5 units wide while one is less than 5 units. They are the same exact shape but different size making them similar.
Answer:
a) 9 meters.
b) The total change in temperature was of 288ºC
Step-by-step explanation:
Both these questions can be solved using rules of three.
a) 72 meters in 8 seconds. How many meters it changes each second(in 1 second)?
8s - 72m
1s - x m



9 meters.
b) In 1 hour, heated by 6ºC. How much in total during 48 hours?
1h - 6ºC
48h - xºC
x = 48*6
The total change in temperature was of 288ºC
Answer:
The number of boys that have school dinners is 381.
Step-by-step explanation:
First, we need to find how many students have school dinners:

The percent of girls that have school dinners:
Now, we need to find the number of boys (b) and girls (g) at a school:

Hence. the percent of boys that have school dinners is given by:


Finally, the number of boys that have school dinners is:
Therefore, the number of boys that have school dinners is 381.
I hope it helps you!
Since the 9 is greater than or equal to 5, we'll round our number up by adding 1 to the 3 in the hundreds place, making it a 4. And also by changing all digits to the right of this new 4 into zeros.
And our rounded number would be 400