The first working out is correct, z = 3
 
        
             
        
        
        
1200 = 100%
35% of 1200 = 420
1200 + 420 = 1620
There are 1620 students enrolled this year.
        
             
        
        
        
Answer:
1. i Sampling bias and 
    ii. Question order bias
2. Non response Bias
3.i. sampling bias
ii.question order bias
4. i. response bias
ii.sampling bias
Step-by-step explanation:
we have basically four types of bias in a research which are;
1. Sampling bias
2. Response bias
3. Non response bias
4. Question order bias
 
        
             
        
        
        
Answer:
Step-by-step explanation:
1) Tangent makes 90 degrees with the radius. Hence
a) Angle ABD = 90-angle BDC = 90-61.3 = 28.7
b) Triangle BCD is isosceles since tangents have equal length.
Hence angle BCD = 180-(61.3+61.3) = 57.4
c) Angle BDC = 57.4 (since triangle BCD is isosceles)
d) Angle BAC and Angle BCD are supplementary. Hence angle BAC = 122,6
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2) Arc length of minor arc BC = 
b) ARc length of minor arc = circumference -minor arc
= 18.713
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3) circumference = pi d =  
 
 
        
             
        
        
        
Answer:
6) The answer is 210p - 105
7) The answer is  -124q + 216
Step-by-step explanation:
1. Always Distributive Property first
6) -14 (8 - 15p)           7) -12 ( -18 + 10q)
     -112 +210p                 216 -120q
2. Combine like terms
6) -112  +  7  = -105   your full answer is 210p -105
7) -120q +   -4q  =  -124q  Your full answer is -124q +216.
Hope this helps.