D. 21 I believe but idk and rn just trynna put in 20 characters but yw
Answer:
A- "national and state governments share power"
Fed and state governments have similar and contrasting powers.
Answer:
the book will not move its own but it is removed by applying other external force
If there are especially few frequencies on the left cease of the abscissa on a frequency polygon when compared to the right quit, the curve is: Negatively skewed.
Definition: Frequency is the measurement of the number of instances that a repeated occasion happens in line with a unit of time. The frequency of wave-like patterns together with sound, electromagnetic waves (which include radio or light), electric signals, or other waves, expresses the range of cycles of the repetitive waveform in line with the second.
The time period frequency refers back to the variety of waves that pass a hard and fast point in unit time. It also describes the wide variety of cycles or vibrations passed through at some stage in one unit of time by a body in periodic movement.
Frequency is a crucial parameter used in technological know-how and engineering to specify the temporal price of exchange determined in oscillatory and periodic phenomena, together with mechanical vibrations, audio signals (sound), radio waves, and light.
Although the standard definition of frequency is based on occasions in keeping with 2d, different units of time may be used, consisting of minutes or hours. for instance, a human heart may beat at a frequency of sixty-eight beats according to the minute. A 78 report on a turntable turns at a charge of 78 revolutions according to a minute or seventy-eight rpm.
Learn more about frequency here: brainly.com/question/254161
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