Answer:
About 0.559 seconds
Step-by-step explanation:
The height equation is:

Where
is the initial height of the book, which is 5, so we can write:

Now, we want time it took for the book to reach ground (h = 0)
So, we substitute h = 0 and solve for t:

It took about 0.559 seconds for the book to reach the ground
Hello!
I believe that 8 cubes are needed to build the given figure
I hope this helps!
Answer:
6
Step-by-step explanation:
base + 2(legs) = 56 (2 legs are the same because it's isosceles)
x + 2(5x - 5) = 56
x + 10x - 10 = 56
11x -10 = 56
11x = 66
x = 6
No because 7/9= 0.777777777789 and 8/9= 0.888888888888889