How is frequency related to period? a) They are the same thing.
b) Period - 1 / frequency.
c) Frequency = amplitude x period.
d) Speed = period / frequency,
e) Period = speed x frequency.​

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers