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 a significant difference in
Deople'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?
O null hypothesis: 4p = 0; alternative hypothesis: Lp 70
O null hypothesis: 4y = 0; alternative hypothesis: 4p = 0
O null hypothesis: 4-12 = 0; alternative hypothesis: 4-170
null hypothesis: 44-470; alternative hypothesis: 44-42 = 0

answer: idk

step-by-step explanation:

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: