Write the series in summation notation. Use the index i and let i begin at 1 in each summation.3 + 9 + 15 + 21 + 27
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Provide an appropriate response.Evaluate 
= by first converting it to a derivative at a particular x-value.
A. - 
B. 
C. - 
D. - 
Mathematics
Find the standard deviation. Round to one more place than the data.15, 42, 53, 7, 9, 12, 14, 28, 47
A. 29.1 B. 17.8 C. 16.6 D. 15.8
Mathematics
Find an equation of a parabola that satisfies the given conditions.Focus (2, 1), directrix x = -4
A. (x - 1)2 = 12(y + 1) B. (y - 1)2 = 12(x + 1) C. (x - 2)2 = 12(y - 1) D. (y - 1)2 = 12(x - 2)
Mathematics
Estimate the value as a whole number or as a mixed numeral where the fractional part is 
.12
A. 12
B. 13
C. 13
D. 12
Mathematics