**Answer:**

1476 cm²

**Step-by-step explanation:**

I like to use the formula ...

SA = 2(LW +H(L +W))

= 2((12 cm)(9 cm) + (30 cm)(12 cm +9 cm))

= 2(108 cm² +(30 cm)(21 cm))

= 2(108 cm² +630 cm²) = 2(738 cm²)

** total surface area = 1476 cm²**

_____

"Lateral surface area" usually refers to the area that is not part of the base(s). For a rectangular prism, it would be the product of the height and the perimeter of the base. You have not designated a base, so we cannot tell if you really want just the lateral surface area or the whole surface area. The above computation figures the whole surface area.

**Answer:**

**The probability that the loan process will take longer than 9 days is 0.6667.**

**Step-by-step explanation:**

The probability that the application takes more than 9 days is given as

Here

x_max=13

x_min=7

x=9 so the value is given as

So **the probability that the loan process will take longer than 9 days is 0.6667.**

m/_A + m/_B = 90

40 + m/_B = 90

-40. -40

m/_B = 50

**Answer:**

44

**Step-by-step explanation:**

He got the right answer, but he kind of did it wrong.

3+x/2=10 simplify both sides of the equation

1/2x+3=10 Subtract 3 from both sides

2*(1/2)=2*7 Multiply both sides by 2

x = 14