Mathematics, 15.07.2019 02:30, emilylunaa
Amail carrier can deliver mail to 36 houses in 30 minutes. mark wants to determine how many houses the carrier can deliver mail to in 7.5 minutes at this rate. he thinks that to find the answer, he should do the following. 1. first divide 36 houses by 30 minutes to find a unit rate of 1.2 houses per minute. 2. then multiply 1.2 houses per minute by 7.5 minutes to get 9 houses. which statement is correct? mark’s method is wrong, because it is impossible to deliver mail to 1.2 houses in a minute. the carrier can only deliver to a whole number of houses. mark’s method is wrong, because it is impossible to deliver mail for 7.5 minutes. the carrier can only deliver mail for a whole number of minutes. mark’s method is correct, because even though it is impossible to deliver mail to 1.2 houses in a minute, 1.2 represents the unit rate of houses per minute. mark’s method is correct, because it is possible to deliver mail for 7.5 minutes; 7.5 represents the unit rate of 7.5 minutes per house.
Answers: 1
Mathematics, 21.06.2019 17:50, 27lcasselberry
Which of these triangle pairs can be mapped to each other using two reflections?
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Mathematics, 21.06.2019 18:00, whocares1234
How many triangles can be drawn with side lengths 4 centimeters, 4.5 centimeters, and 9 centimeters? explain
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Mathematics, 21.06.2019 21:30, amesha62
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
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