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1 answer:
Answer:
1464 inch²
Step-by-step explanation:
given first prism sides: length - 10 width - 10 height - 10
given second prism sides: length - 12 width - 12 height - 12
using the formula below:
for the first prism:
2(10*10+10*10+10*10)
600 inch²
for the second prism:
2(12*12+12*12+12*12)
864 inch²
So total surface area is (864 inch² + 600 inch²) =1464 inch²
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Answer:
17
Step-by-step explanation:
Using the law of cosines in ΔABC
b² = a² + c² - (2ac cosB) ← substitute in values
= 25² + 28² - (2 × 25 × 28 × cos36.9°)
= 625 + 784 - 1400 cos36.9°
= 1409 - 1400 cos36.9° ( Take the square root of both sides )
b = ≈ 17 ( nearest whole number )