Step-by-step explanation:

Answer: the answer is Sarah
Step-by-step explanation:
Just got it correct on Plato
Z=kx, 30=8k, so k=30/8=15/4 and z=15x/4, so when x=4, z=15.
You turn the percentage to a decimal which is 75%=0.75
Data from random samples will not always include the same values. Values are chosen randomly and they may or may not be the same. So means will vary among samples.