Find the area of the surface of the half cylinder startset left parenthesis r comma theta comma z right parenthesis : r equals 4 comma 0 less than or equals theta less than or equals pi comma 0 less than or equals z less than or equals 9 endset using a parametric description of the surface.

is there answer choices?

yes

step-by-step explanation:

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8