A biased coin has probability of landing heads and probability of landing tails. The coin is flipped until the very next occurence that matches the initial flip. On average, what is the total number of flips required (including the first one)?

What is the value of the expression below? (81^2)^1/8

State if the two triangles are congruent. if they are, state how you know?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60