Answer: 5.37
Step-by-step explanation:
Let x = ACT scores.
Given: ACT scores have a mean of 20.8 and 9 percent of the scores are above 28. The scores have a distribution that is approximately normal.
i.e. P(X>28)=0.09 (i)
Now,
(ii)
One -tailed z value for p-value of 0.09 =1.3408 [By z-table]
From (i) and (ii)

Hence, the standard deviation = 5.37
Answer:
d = 7.2
Step-by-step explanation:
12 + d = -4.8
subtract 12 from both sides and you get
d = 7.2
Answer:
3rd one
Step-by-step explanation:
any 2 squares are congruent since all four sides of any square are congruent
Answer:
9 in
Step-by-step explanation:
The diameter of a circle is a chord or line that passes through the center point of a circle. It's like a radius, except the line extends to the other side
Hope this helps!
JoeyHill