Time taken to reach a person located 5m from the source is 0.2s
<u>Explanation:</u>
Given:
Frequency, f = 10Hz
Wavelength, λ = 2.5m
Distance, d = 5m
Time, t = ?
We know:
velocity = f X λ
v = 10 X 2.5
v = 25 m/s
We know:
Distance = speed X time
On substituting the value we get:
5 = 25 X t
t = 0.2 seconds
Therefore, time taken to reach a person located 5m from the source is 0.2s
Answer:
Refer to the picture above
−5 < a − 4 < 2
+4 +4
-1 < a < 6
Answer is B. The second one
Answer:
12x
Explanation:
3x − 10 + 2x + 3x + x + 20 + 2x + 10 + x − 20
= 3x + −10 + 2x + 3x + x + 20 + 2x + 10 + x + −20
Combine Like Terms
= 3x + −10 + 2x + 3x + x + 20 + 2x + 10 + x + −20
= (3x + 2x + 3x + x + 2x + x) + (-10 + 20 + 10 + −20)
= 12x
Answer:
The Greatest Common Factor, the GCF, is the biggest ("greatest") number that will divide into (that is, the largest number that is a factor of) both 2940 and 3150. On the other hand, the Least Common Multiple, the LCM, is the smallest ("least") number that both 2940 and 3150 will divide into.
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