Answer:
(45%) 0.45, 11/20 (0.55) and 0.6
Step-by-step explanation:
So 8.34=3/4 of preset
find 4/4 of present
divide 8.34 by 3
8.34/3=2.78=1/4 of present
1/4 times 4=4/4
2.78 times 4=4/4 present=11.12
answe ris present cost $11.12
Answer:
(a) -3.708
(b) 1.706
(c) 0.490
Step-by-step explanation:
The z-score of normal distribution is given as:

(a)
Given:
Score is, 
Mean value is, 
Standard deviation is, 
z-score is, 
(b)
Given:
Score is, 
Mean value is, 
Standard deviation is, 
z-score is, 
(c)
Given:
Score is, 
Mean value is, 
Standard deviation is, 
z-score is, 
Knowing the squareroot of 81 is 9, we can easily know that square root of 83 is close to 9.
9 to the closest tenth is 10.
Hope I helped :)