The answers are going to be: D & E
Explanation:
Any number that was multiplied by less then one is going to be your answer. :)
Answer:
a) 0.2347, 0.0007
b) 1.30
c) 0.63
Step-by-step explanation:
Given –
Mean = 73.4
Sigma = 4.7
Probability that the speed is greater than 70 is
P (X>70) = P (z> (70-73.4)/4.7) = P (z>-0.72) = 0.7653
a) The probability that a car is not speeding = 1 - 0.7653 = 0.2347
The probability that all 5 cars are not speeding = (0.2347)5 = 0.0007
b) E (X) = 1/p = 1/0.7653 = 1.30
c) Standard deviation = Sqrt (1-p/p) = (1-0.7653)/0.7653 = 0.63
Answer:
450 miles , $90.5
Step-by-step explanation:
Let d be the miles driven
59 + 0.07d = 50 + 0.09d
d = 450
The two plans cost the same when he drives for 450 miles which the respective cost is 59 + 0.07(450) = $90.5
Answer:
32.72
Step-by-step explanation:
36.36/100
0.3636
0.3636 times 90 (I use 90 because 100-10=90) 10% tax, so 90% original cost.
32.72
19,999 because 5 and up round it up, lower than 5 round it down.
