Answer:
Total surface area of rectangular prism is 554 cm^2
Step-by-step explanation:
Surface area of rectangular prism
Length = 16 cm
width = 8 cm
height = 6 cm
Surface area of rectangular prism = 2 [ length x width +width x height +heightxlength]
= 2[ 16x8+8x6+6x16]
= 2[ 128+48+96]
= 2[ 272]
=554 cm^2
If there are 4 girls to every 9 students, then there are 5 boys to every girl, 9-4=5. So, there are more boys in the class.
Answer: 6 hours
Step-by-step explanation:
Given, Tim and Jim are working on a school project together.
Tim takes 10 hours to complete the school project.
If Jim worked alone, it would take him 15 hours
Let t be the time they both take if they work together.
Then, 

So, it will take<u> 6 hours</u> to complete the school project together .