Answer:
i think 8cm is triangle area
Step-by-step explanation:
because i saw that 8cm on the side so I told 8cm the triangle.
Answer: 37
Step-by-step explanation:
Given : Significance level : 
Critical value : 
margin of error : E= 1 mile per gallon
Population standard deviation:
miles per gallon.
We know that when the population standard deviation is known then the formula to find the sample size is given by :

[Round to the next whole number.]
Hence, the required number of automobiles should be used in the test = 37
The first part is 1325
10 x 35=350
15 x 65=975
The you add them which equals 1325
The last one: the arc AB is a semicircle.
a semicircle is 180 degrees