Answer:
H0: mu = 100
Ha: mu > 100
It is preferable to use this Ha than mu < 100 because it meets the specifications.
Step-by-step explanation:
It is preferable to use mu > 100 as the alternate hypothesis than mu < 100 because the specifications state that mean strength of welds should exceed 100 lb/in^2.
Exceed is expressed using the inequality, greater than.
Therefore, the alternate hypothesis should be expressed using greater than.
Answer:
The Mark's average speed was
Step-by-step explanation:
we know that
To find out the average speed, divide the total distance by the total time
Let
s -----> the average speed in miles per hours
x ----> the total distance in miles
y ----> the total time in hours
we have
substitute
Note that a percentile tells us how many percents of numbers that are above the number at the percentile. So the 70th percentile tells us that 70% of the students are taller than Jake. That means 30% of the students are either at the same height or shorter than Jake.
30% of 1100 would be 0.3*1100 = 330.
So there are 330 students that are either at the same height or shorter than Jake.
This could be answered by using the distributive property.
This is an algebra property which is done to multiply a particular
term and two or more terms in a set of parentheses.
So for our problem, 6 (3 + 9):
You first, multiply 6 x 3 = 18
And multiply 6 x 9 = 56
Thus, the answer is 18 + 56 = 72
But following the order of operations, you should add first
the number inside the parenthesis and then multiply it to the number outside
the parenthesis but it will the same answer still. (6 x 12 = 72)
Answer:
Two double roots in this case.
I could say 4, but you have a pair of double roots x = 6 and x = -2
Step-by-step explanation:
x = 6 is a double root of f(x)
x = -2 is a double root of f(x)