Answer: = (the third option)
Step-by-step explanation
There were 15 gallons of water to begin with. hope this helps
Answer:
n = 18 cycles
Step-by-step explanation:
To know how many times does the current oscillates in the given time, you take into account that the number of oscillation can be calculated by using the following expression:
(1)
f: frequency of the oscillation of the current
t: time = 0.30s
The frequency is the number of cycles per second, that is, f = 60 cycles/s
You replace the values of f and t in the equation (1):

In 0.30s the current oscillates 18 times
The more digits you have the bigger the number, unless you have a long decimal, and in that case only is the number smaller in value.
1, yes by the rule of S:A:S
2. yes by the rule of aas
5. yes by the rulee of side-hypnotuse-angle
4 yes by side angle side