Step-by-step explanation:
I am actually new to brainly
will you please help me??
Answer:
0.4588
Step-by-step explanation:
When we have random sample, the z score formula we use is:
z = (x-μ)/σ/√n
where x is the raw score = 14
μ is the population mean = 13.9
σ is the population standard deviation = 2.9
n is random number of samples = 9
z = 14 - 13.9/2.9/√9
z = 0.1/2.9/3
z = 0.10345
Probability value from Z-Table:
P(x<14) = 0.5412
P(x>14) = 1 - P(x<14) = 0.4588
The probability that their mean life will be longer than 14 years is 0.4588
Do you mean simplified ratio of 50:30, because if you did then the simplified ratio of 50:30 would be 5:3. Divide both numbers by 10.
Answer:
x-int:(-2,0)(-4,0) . y-int:(0,8)
Step-by-step explanation:
y = x2+6x+8 and y = (x+2)(x+4)
x-int:
x+2=0
x= -2
(-2,0)
x-int:
x+4=0
x=-4
(-4,0)
y-int: plug 0 for x
y=(0+2)(0+4)
y=8
(0,8)
