The period is the reciprocal of the frequency, in other words, one divide by the frequency. If the frequency is in Hertz, the period is in seconds.
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To calculate ten percent of a value, multiply the value by 0.1. For example, ten percent of 75 is equal to 75 x 0.1 = 7.5.
25
To determine the number of ways to make 75, we need more context. Are we looking at different combinations of numbers, or are we considering factors or multiples of 75? If we are looking at combinations, we could use a partition function or dynamic programming to calculate the number of ways. If we are considering factors or multiples, we would need to find all the factors of 75 and calculate the combinations from there.
Divide the numerator by the denominator. For example, 3/4 = 3 divided by four =.75
100 km and 75 km are displacements, NOT velocities. The resultant displacement is 25 km north,