Answer:
x=55
a=11.47
Step-by-step explanation:
To find x we add all the angles in the triangle. The three angles in a triangle add to 180 degrees
35+x+90 = 180
Combine like terms
125+x=180
Subtract 125 from each side
125-125+x=180-125
x= 55
To find a
sin 35 = opposite side/ hypotenuse
sin 35 =a/20
Multiply each side by 20
20sin35 =a
11.47152873 =a
400,000+80,000+4,000+100+60+8
The value of the lower class limit of the 3rd class is; 11.0
<h3>What is the lower class Interval?</h3>
The lower class limit is lowest value of that class interval while upper class limit is highest value of that class interval.
Hours Number of Students
0.0–5.4 12
5.5–10.9 16
11.0–16.4 14
16.5–21.9 11
22.0–27.4 6
Now, the third class interval is 11.0–16.4 and from definition of lower class limit, we can say that the lower class limit of the 3rd class is; 11.0
Read more about lower class interval at; brainly.com/question/16631975
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Answer 1: 
Answer 2: 
Note: BOTH of those answers are correct. Chose either one.
<u>Factor left side of equation</u>
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<u>Set factors equal to 0</u>
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