Perform the operation and write the result in the standard form.(6 - 
)(2 + 
)
A. 67 + 56 i
B. 67 - 56 i
C. 3037 + 776 i
D. -67 + 56 i
Answer: A
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Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 54 ft and the vertical clearance must be 18 ft at a point 8 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Determine whether the function is a probability density function over the given interval.f(x) = 
A. No B. Yes
What percent of people in the chart in number 7 have a blood pressure between 120 and 159?
A. 30% B. 0.3% C. 3.3% D. you cannot combine the frequencies to find out
Follow the principles of estimation to find an approximate value.Round the percent to the nearest one and dollars to the nearest ten thousand.Find 8.3% of $78,062.29.
A. $640,000.00 B. $64,000,000.00 C. $6400.00 D. $6479.17