#3) A survey of U. S. adults found that 69% of those who text on cell phones receive spam or unwanted messages. You randomly select 100 U. S. adults who text on cell phones. A) Determine whether you can use a normal distribution to approximate the binomial distribution. B) Find the probability that the number who receive spam or unwanted messages is exactly 70. C) Find the probability that the number who receive spam or unwanted messages is at least 70. D) Find the probability that the number who receive spam or unwanted messages is fewer than 70. E) Would any of the events in B through D be considered unusual? Justify your answer.

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

Suppose a gym membership has an initial enrollment fee of $75 and then a fee of $29 a month. which equation models the cost, c, of the gym membership for m months?

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.