A ride-sharing company claims that the cost of rides follows a normal distribution with a mean of $10.52. after paying for a ride from this company, a rider reports that his price is in the 85th percentile of all other riders prices. if this rider paid $15,93, what is the approximate standard deviation of this company’s ride sharing cost?

a=r

d=q

c=p

b=s

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amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

5+2x=a

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