Answer:
8,16
Step-by-step explanation:
There are 6 less boys then girls
there are 6 more girls then boys
there are 15 boys compared to 21 girls

Alternatively, you can write radicals as rational exponents, so that you get

Then recalling that

, you have
Answer:
surface area = 544 cm²
Step-by-step explanation:
surface area = (16)(8 + 6 + 8 + 6) + (2)(8)(6) = 448 + 96 = 544 cm²