The speed of the water in the 3 feet radius is 25 feet per second.
You can dispose a number 
of elements in a matrix-like formation with 
shape if and only if 
and 
both divide , and also 
.
So, we need to find the greatest common divisor between 
and 
, so that we can use that divisor as the number of columns, and then.
To do so, we need to find the prime factorization of the two numbers:
So, the two numbers share only one prime in their factorization, namely 
, but we can't take "too many" of them: has "three two's" inside, while has "five two's" inside. So, we can take at most "three two's" to make sure that it is a common divisor. As for the other primes, we can't include 
nor 
, because it's not a shared prime.
So, the greater number of columns is 
, which yield the following formations:
Answer:
y = 0.5cos(4(x+π/2)) -2
Step-by-step explanation:
The centerline of the oscillation is at -2, so only the 2nd and 4th choices are viable.
The multiplier of x is computed from (2π)/period. One period is π/2, so the multiplier of x is ...
... 2π/(π/2) = 4 . . . . . matching the 2nd selection.
The horizontal offset in the second equation (π/2) is of no consequence, as it is one full period of the function.
The peak-to-peak amplitude of the oscillation is 1 unit, so the multiplier of the cosine function (which usually has a peak-to-peak value of 2 units) is 0.5. Every offered answer has that characteristic.
The appropriate choice is the 2nd one:
... y = 0.5cos(4(x+π/2)) -2
Step-by-step explanation:
I think this is the answer
