A "regular quadrilateral" is a square, so the length and width are both 4 cm. The surface area of a rectangular prism is given by
S = 2(LW +H(L +W))
S = 2((4 cm)*(4 cm) +(6 cm)*(4 cm +4 cm))
S = 2(16 cm² +48 cm²)
S = 2*64 cm² = 128 cm²
The surface area of the prism is 128 cm².
Answer:

Step-by-step explanation:
The answer is in the attachment,
Answer:
x = 6
Step-by-step explanation:
12x+252=324
Subtract 252 from each side
12x+252-252=324-252
12x =72
Divide each side by 12
12x/12 = 72/12
x =6
Answer:
8
Step-by-step explanation:
50 is at rank 8.5, but since its a 53% chance. it would be below the .5 area and round to 8
The answer is 
Let's build the expression piece by piece, translating sentences into formulas:
"3/5 times..." 
"5 less than a number..." 
So, the first block becomes
"3/5 times 5 less than a number..." 
"...is no more than 27" 
So, putting the pieces together, you have the answer