Mathematics, 18.07.2020 17:01 drea445
1. An article on CNN reports that Americans are increasingly skimping on their sleep. A researcher wants to determine if Americans are sleeping less than the recommended 7 hours a night. He takes a random sample of 150 Americans and computes the average sleep time of 6.7 hours a night. The standard deviation is known to be 2.1 hours. The level of significance is .01.
Answers: 1
Mathematics, 21.06.2019 12:30
What is the range of this function? all real numbers such that y ≤ 40 all real numbers such that y ≥ 0 all real numbers such that 0 ≤ y ≤ 40 all real numbers such that 37.75 ≤ y ≤ 40
Answers: 3
Mathematics, 21.06.2019 14:30
The sum of two numbers is 58. the first number is 8 less than half the second number. let c represent the first number. let drepresent the second number. which statements about solving for the two numbers are true? check all that apply.the equation  represents the sum of the two numbers.the equation  represents the sentence “the first number is 8 less than half the second number.”the equation  represents the relationship between the two numbers.the equation  represents the sum of the two numbers.the number d is 14.the number c is 44.the number c is 14.the number d is 44.
Answers: 1
Mathematics, 21.06.2019 15:00
Select the correct answer from each drop-down menu. rewrite the formula to find voltage. the formula for electrical power (p, in watts) is where v is the voltage in volts and r is the resistance in ohms. for a particular brand of water heater, r is 32 ohms and p is 0.5 watts. the formula to find v is , and the voltage at which the heater operates is volts.
Answers: 1
1. An article on CNN reports that Americans are increasingly skimping on their sleep. A researcher w...
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