Iwill give you 5 stars and a heart.

find the surface area of a rectangular prism with a length of 10 cm, a width of 4 ½ cm, and a height 8 ¾ cm. round your answer to the nearest hundredth.

a343.75 square centimeters

b.345 square centimeters

c.344.79 square centimeters

d.340.75 square centimeters

Ok so a rectangular prism is the same as a rectangular cuboid.

The surface area is all the areas of the faces added together ->

There are three different faces that occur twice

length -> l
width -> w
height ->h

2( l * w ) + 2( l * h ) + ( w * h )

2 ( 10 * 4.5 ) + 2 ( 10 * 8.75 ) + 2 ( 4.5 * 8.75 ) = 343.75 cm2

Therefore it's A 

Hope this helps :P