Answer:
9/10
Step-by-step explanation:
first you find the lowest common denominator. 1/2 becomes 5/10, 2/5 becomes 4/10. 5/10+4/10=9/10
The expression of the height is

the index "n" is the numbers of times that the ball is down, to n=1 the height is 8 inches, to n=2 the height is 4 inches.
An when n=5, the height is

the anwers is 0.5 inches
Answer:
1.5974
Step-by-step explanation:
Water can freeze at 32 degrees f
1800
LCM of 10 and 15 = 30
LCM of 6 and 20 = 60
30(60) = 1800