WHAT THE SURFACE AREA

1 answer:

7 0

Hey there! :)

Answer:

16 m².

Step-by-step explanation:

Find the surface area by finding the areas of each face:

The base is a square, so use the formula A = s²

A = 2²

A = 4 m².

Find the areas of the congruent triangular lateral sides. Use the formula:

A = 1/2 (bh)

A = 1/2 (2 · 3)

A = 1/2 (6)

A = 3 m².

There are 4 triangular faces, therefore:

3 × 4 = 12 m².

Add up the areas from the triangles and square base:

12 + 4 = 16 m².

Therefore, the surface area of this square pyramid is 16 m².

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Using proportions, it is found that the life span of the person would be 14 years, 212 days and 22 hours shorter.

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2 packs a day for 35 years is 40 cigarettes a day for 12775 days, as $35 \times 365 = 12775$ .
Thus, a total of 511000 cigarettes, as $40 \times 12775 = 511000$ .
Assuming each cigarette costs 15 minutes of life, the person loses 7665000 minutes of life, as $15 \times 511000 = 7665000$

One year has 525600 minutes, thus the person loses 14 years of life, as $\frac{7665000}{525600} = 14.5833333$

Looking at the decimal part, the person loses 212 days of life, as $0.5833333 \times 365 = 212.916666655$
Again looking at the decimal part, 22 hours, as $0.916666655 \times 24 = 22$