A scientist who studies sleep has developed a new technique to help people sleep each night. He is conducting a study of 100 people and wants to determine if there is significant difference in people's amount of sleep before using the technique compared to after using the technique. Which of the following describes the scientist's null and alternative hypotheses?
1. null hypothesis: Up = 0; alternative hypothesis: 4p 70
2. null hypothesis: Lo + 0; alternative hypothesis: 4p = 0
3. null hypothesis: 4 - 4y = 0; alternative hypothesis: 44-470
4. null hypothesis: 44-42 +0; alternative hypothesis: 44-42 = 0

answer: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

step-by-step explanation: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation: