Mathematics, 08.06.2021 21:40 Scoopaloop
Which of the following demonstrates the Commutative Property of Multiplication?
A) 5(2a β 3) = 10a β 15
B) 10a β 15 = (2a β 3) β
5
C) 5(2a β 3) = (2a β 3) β
5
D) (5 β
2a) β 3 = 5(2a β 3)
Answers: 2
Mathematics, 21.06.2019 15:30
Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)
Answers: 2
Mathematics, 21.06.2019 18:00
Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.
Answers: 1
Mathematics, 21.06.2019 19:40
Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a βpositiveβ test result is one that indicates presence of epo in an athleteβs bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297
Answers: 1
Mathematics, 22.06.2019 00:00
Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
Answers: 3
Which of the following demonstrates the Commutative Property of Multiplication?
A) 5(2a β 3) = 10a...
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