Which of the following formulas will assist you in calculating the surface area of a cylinder?

Mathematics

1 answer:

bija089 [108]3 years ago

6 0

The actual answer is: SA = 2rh + 2r2

The answer is not SA = 2lw + 2wh + 2lh, the other guy has it incorrect. I put his answer in an assignment and I got it wrong. Trust me, the correct answer is SA = 2rh + 2r2.

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What is the value of s in the equation below 0.3s + 0.8 (s -12)=33.3

nikdorinn [45]

First, you distribute 0.8 through the parentheses by multiplying 0.8 by s and -12, which gets you to 0.8s-9.6. Now, the equation is changed to 0.3s+0.8s-9.6=33.3. Then, you add like terms (add the two numbers with the s) by doing 0.3s+0.8s which gets you to 1.1s-9.6=33.3, all thats left is adding 9.6 on both sides which gets you to 1.1s=42.9. Now finally, you divide 42.9 by 1.1 and you get 39. The value of s in the equation is 39.

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3 years ago

Write each of the following numerals in base 10. For base twelve, T and E represent the face values ten and eleven, respectively

uysha [10]

(a)

421₅ = 4×5² + 2×5¹ + 1×5⁰

… = 100 + 10 + 1

… = 111

(b)

11101₂ = 1×2⁴ + 1×2³ + 1×2² + 0×2¹ + 1×2⁰

… = 16 + 8 + 4 + 0 + 1

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(c)

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… = 144 + 36 + 10

… = 190

7 0

2 years ago

Hi !! can someone help prove these please

beks73 [17]

Step-by-step explanation:

Here's the first one for ya. I can't tell what the first denominator of the second one is [CosB, CscB, or SecB?], so unless you get back to me on that, then I can't help you with it.