True or false, I need help. I'm an slow when it comes to math

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me

The ratio of the height of two similar cylinders is 4 to 3 what is the ratio of their volumes

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.