Amy needs to rust-proof a wrought-iron fence made of a rail that is a 1 cm thick by 4 cm wide by 102 cm long rectangular prism s
upported by posts that are 2 cm by 2 cm by 1 m high rectangular prisms. The posts are spaced 8 cm apart, attach to the bottom of the rail, and are embedded in cement. How much exposed surface area needs to be rust-proofed?
2 answers:
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Answer:
D) Undefined
Step-by-step explanation:
Answer:
Explanation:
Since, there are two possible outcomes for every toss (head or tail), the sample space for<em> a coin tossed 8 times</em> is 2×2×2×2×2×2×2×2 = 2⁸ = 256.
<em>Landing on heads all 8 times</em> is just one of the possible outcomes: HHHHHHHH ⇒ 1.
Hence, the <em>probability </em>is calculated from its own definition:
Probability = number of favorable outcomes / number of possible outcomes