Select the mistake that is made in the proof given below. Theorem. The product of an even integer and any other integer is even. Proof. Suppose that x is an even integer and y is an arbitrary integer. Since x is even, x = 2k for some integer k. Therefore, xy = 2m for some integer m, which means that xy is even. ■
a. Assuming facts that have not yet been proven.
b. Misuse of existential instantiation.
c. Generalizing from examples.
d. Failure to properly introduce a variable.

(x+3)(x+7)

step-by-step explanation:

the answer is:

the lateral area is equal to

to find the lateral area of the square pyramid, first we need to find the perimeter of the base, and then, find the lateral area using the following formulas:

where,

s, is the base length

slant height, is the height of a the side of the pyramid

we are given:

now, calculating the perimeter of the base, we have:

then, calculating the lateral area:

hence, we have that the lateral area is equal to

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