Answer: c
Step-by-step explanation:
Z score=(data value-mean)/standard deviation
z=(90-100)/15=-0.6666666667
Since you have an angle and at least one side you can use either sine, cosine or tan. For this question, you would use sine like above. Hope this helps!
Answer:
4 2/4
Step-by-step explanation:
4 1/2 + 1/2 = 4 2/4
i just added em up