, 08.11.2019 02:31 shyann78

# According to moebs services inc., an individual checking account at u. s. community banks costs these banks between $175 and$200 per year. suppose that the average annual cost of all such checking accounts at u. s. community banks is $190 with a standard deviation of$20. find the probability that the average annual cost of a random sample of 100 such checking accounts at u. s. community banks is

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Mathematics, 20.06.2019 18:02
Hello everybody. can anybody me come up with detailed study plan on what topics to study from algebra 1 & 2, trig, and any other topic nesscery for success as a new beginner in pre-calculus. i dont have much math history but the basics. this will greatly me.
Mathematics, 21.06.2019 15:00
Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?