Answer: A. 0.0164
Step-by-step explanation:
Given : The lengths of human pregnancies are normally distributed with a mean 
Standard deviation : 
Let X be the random variable that represents the length of pregnancy of a randomly selected human .
z-score : 
For X = 300
Now, the probability that a pregnancy last at least 300 days will be :-
Hence, the probability that a pregnancy last at least 300 days =0.0164
Answer
3.26$
Step-by-step explanation:
Answer:
Soccer = 120
Tennis = 220
Step-by-step explanation:
The total number of students enrolling for soccer and tennis classes is, 340.
The ratio number of students enrolling for soccer and tennis classes is, 6:11.
Then,
6x + 11x = 340
17x = 340
x = 20
The number of students enrolled for soccer class is, 6x = 6 × 20 = 120.
The number of students enrolled for tennis class is, 11x = 11 × 20 = 120.
Answer: -21 + -18t
Step-by-step explanation:
-3(7+6t)
-3 x 7= -21
-3 x 6t= 18t
Answer:
Step-by-step explanation:
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Good evening ,
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2(7) + 5(1) + 3(-3) = 10
3(7) - (1) + 4(-3) = 8
5(7) - 2(1) + 7(-3) = 12
Then (7,1,-3) is a solution to system
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