Answer: 2/12 2.12
Step-by-step explanation: You did not put the answers in so
Answer:
C. We want to determine if there is significant evidence that the mean strength of welds exceeds 100 lb/in2. The current hypotheses correctly place the burden of proof on those who wish to assert that the specification is satisfied.
Step-by-step explanation:
Given
Required
State why it is preferred to
From the question, we understand that the initial test is the force required to break the weld.
This represents the null hypothesis
Because the required force can not be less than the strength of the weld (it must match the force keeping the weld), the null hypothesis is represented as:
Reading the question further;
The specification requires that the mean strength should exceed 100
In inequalities, exceeds means greater than, and it is represented with >
So, the null hypothesis is rightly represented as:
Hence: (c) is true
I would start by 0 then i would begin by 5, 10, 15,20,25,30,35,40,45,50,55,60 and then stop and end it with 1
Answer:
112.5 minutes
Step-by-step explanation:
Working together, Daniel and Donnie can clean the llama pen in 50 minutes. On his own, Daniel can clean the pen in 90 minutes.
Let the number of minutes it takes Donnie to clean his Ilama pen be represented by: x
Hence, we have the expression:
1/90 + 1/x = 1/50
The Lowest Common Denominator for the left hand side = 90x
Hence:
x + 90/90x = 1/50
Cross Multiply
50(x + 90) = 90x
50x + 4500 = 90x
Collect like terms
4500 = 90x - 50x
4500 = 40x
Divide both sides by 40
x = 4500/40
x = 112.5 minutes
Therefore, it takes Donnie 112.5 minutes to clean the llama pen on his own.
They are called “Adjacent Angles”