triangle B. because congruent is supposed to be the same shape same size but triangle b is same shape but a different size
Answer:
a) 
b) Null hypothesis: 
Alternative hypothesis: 
And we can use a t test procedure in order to check if the true mean is equat to the desired value.
Step-by-step explanation:
For this case we know that this:
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69.5 bpm
Part a
If we convert this with symbols we can write this as:

Part b
We have the following info given:
represent the sample mean
represent the sample size
We have the following system of hypothesis:
Null hypothesis: 
Alternative hypothesis: 
And we can use a t test procedure in order to check if the true mean is equat to the desired value.
The numbers are 109 and 327. Hope it helps!
The first one is A and the second one is D.
Answer: 24 cm
Step-by-step explanation:
33 + 23 + x= 180
56 + x = 180
56-56 +x = 180-56
x = 24 cm