60 POINTSSS HELP

Which is an example of a compare-and-contrast text structure?

A. Pumice stone is formed when volcanic lava cools and hardens.

B. Smelting is the process used to remove minerals from rocks.

C. Silver turns black over time, but there are ways to help prevent this.

D. Gold and silver are precious metals, but gold is more valuable.

D

Step-by-step explanation:

D. Gold and silver are precious metals, but gold is more valuable

Step-by-step explanation:

It says that they are both precious metals which is compare but gold is more valuable which is contrast.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.