Dawn throws a biased coin 10 times. She gets 4 Tails
Elena throws the same coin 50 times.
She gets 25 Tails
Mel is going to throw the coin once.
(i) Whose results will give the better estimate for the probability that she will get Tails.
Dawn's or Elena's?
You must give a reason for your answer.

What is the length of bc ? enter your answer in the box.bc =

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?