2 x 10^5 standard notation
2 answers:
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Ratio of tea to lemonade in the new mixture is 3 : 2
<h3><u>Solution:</u></h3>Given that volume of a beverage prepared by Miki containing tea and lemonade = 2 gallons
Ratio of tea and lemonade in beverage prepared by Miki = 3:1
Then Miki added one half of gallon of lemonade to the mixture.
Need to determine ratio of tea and lemonade in the new mixture.
Lets first calculate volume of tea and volume of lemonade in old mixture that is the one before adding one half of gallon of lemonade.
Given ratio of tea and lemonade in old mixture = 3: 1 , means our of every four parts of mixture, 3 parts are of tea and 1 part is of lemonade.
Given that one-half gallon of lemonade is added to old mixture to form new mixture.
So Volume of lemonade in new mixture = Volume of lemonade in old mixture + one half gallon = 0.5 + 0.5 = 1 gallon
As there is no change in volume of tea , so Volume of Tea in new mixture = Volume of tea in old mixture = 1.5 gallons
Ratio of tea : lemonade in new mixture = 1.5 : 1 = 3 : 2
Hence ratio of tea to lemonade in the new mixture is 3 : 2.
Answer:
623
Step-by-step explanation:
Given that margin of error (E) = 3 unit, standard deviation (σ) = 29, sample size (n) = ?
a) The confidence (C) = 99% = 0.99
α = 1 - C = 1 - 0.99 = 0.01
α/2 = 0.01 / 2 = 0.005
From the normal distribution table, The z score of α/2 (0.005) is the critical value and it corresponds to the z score 0.495 (0.5 - 0.005) which is 2.58.
b) The margin of error (E) is given as:
<h3>The minimum sample size (n) is 623