Step-by-step explanation:
for 1 min=9 wraps
for x(unknown minutes)=360 wraps
so I crossed multiply:
9x=360
x=360/9
x=40
so it takes 40 minutes to make 360 wraps
The z-score for 36,000 is (36,000 - 40,000) / (15,000 / √25) = -1.333
The z-score for 42,000 is (42,000 - 40,000) / (15,000 / √25) = 0.6667
P(36,000 < x < 42,000) = P(-1.3333 < z < 0.6667)
P(z < 0.6667) - P(z < -1.3333)
0.7475 - 0.0913
0.6562
A. About $80 ; 53 round down to 50, 67 round up to 70
B. $53 + $67 = 120
200 - 120 = 80
Exactly $80
Answer:
The answer is 3.9 :)
Step-by-step explanation:
