Find an equation equivalent to x2 - y2 = 4 in polar coordinates. a. cos2 (theta) - sin2 (theta) = 4r
c. r cos2(theta) = 4
b. cos2 (theta) - sin2 (theta) = 4
d. r2 cos2(theta) = 4  
Please select the best answer from the choices provided​

How do you divide 9/4 divided by 10/3

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Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit