Answer:
a. no, there are no sufficient data to use
b. assumption b is right
Step-by-step explanation:
a. for the standard deviation to be calculated at 99% confidence, the data needed should be the mean (given), the variate value to be calculated for(not given), the standard deviation(not given), the z value of the normal distribution ( not given),
since there are too many unknown, the data given are not sufficient to calculate.
b. validity of this interval requires that coating layer thickness be at least approximately normally distributed.
Let d=discriminant. The the rule is:
d>0, there are two real solutions
d=0, there is one real solution
d<0, there is no real solutions (but there are two imaginary solutions)
So if it is positive, there are two real solutions.
Answer:
50 pounds of bananas
37 pounds of raspberries
Step-by-step explanation:
3.25(b) + 1.75(b - 13) = 227.25
5b - 22.75 = 227.25
5b = 250
b = 50
b - 13 = 37
When two lines are parallel they have the same slope. If we know p and q are parallel and the slope of q = -3, then the slope of p also equals -3.
The fact that they have the same slope mean they never meet: an important property of parallel lines.
Answer:
Line A is x = -3
Line B is y = 2.5
Step-by-step explanation:
