6)
A computer programmer worked 12 hours and earned $510. What is the hourly rate?
A)
$42.50
1 hour
B)
$47.25
1 hour
C)
$50.00
1 hour
D)
$41.25
1 hour

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.