Mathematics, 30.12.2019 23:31 deepspy599otchpd
Two college roommates have each committed to donating to charity each week for the next year. the roommates’ weekly incomes are independent of each other. suppose the amount donated in a week by one roommate is approximately normal with mean $30 and standard deviation $10, and the amount donated in a week by the other roommate is approximately normal with mean $60 and standard deviation $20. which of the following is closest to the expected number of weeks in a 52-week year that their combined donation will exceed $120 ? 0; the combined donation never exceeds $120 in a weeka1 weekb3 weeksc5 weeksd8 weeks
Answers: 1
Mathematics, 21.06.2019 21:30
Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?
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Mathematics, 21.06.2019 23:30
Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?
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Mathematics, 22.06.2019 04:00
Acontainer full of water weighs 15.5 lbs. when ¼ of the water is poured out, the container now weighs 12 ½ lbs. how much does the container weigh when empty?
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Two college roommates have each committed to donating to charity each week for the next year. the ro...
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