Provide an appropriate response.
= ? (percent)
A. 1.28
%
B. 0.77
%
C. 7.77
%
D. 77
%
E. none of the above
Answer: D
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Write the number in scientific notation.0.000004045
A. 4.045 x 106 B. 4.045 x 10-7 C. 4.045 x 10-5 D. 4.045 x 10-6
Solve the problem.The relation between escape velocity, ve, and orbital velocity, vc, is described by the equation 
. If a spacecraft requires a velocity of 85,800 miles per hour in order to escape the gravitational pull of Planet A, what velocity is needed to travel in a circular orbit around Planet A? Round to the nearest hundredth.
A. 85,798.59 miles per hour B. 121,339.52 miles per hour C. 60,669.76 miles per hour D. 414.25 miles per hour
Determine whether the statement is true or false.The union of the sets {
x > 1 and {
x < 1} is (-?, ?).
A. True B. False
Lauri worked full-time at a health club last year earning $23,000. Last year, $1,090 in earnings was needed for one Social Security credit. Lauri earned 4 credits for the year.
Answer the following statement true (T) or false (F)