A doctor wants to determine if a new medication for cholesterol is more effective than the previous medication. The doctor informed his patients of the new medication and asked them if they would like to participate in a drug trial to test the effectiveness of the new cholesterol medicine compared to the current medication. Twenty-five patients who were currently taking medication for cholesterol volunteered and were given the new medication. After two months, the patients’ cholesterol levels are checked. Which of the following is a true statement about the design of this experiment?

This experiment will show the effectiveness of the new cholesterol medicine.

Because a random sample was not used, the doctor will not be able to determine the effectiveness of the new medicine.

Because the doctor did not have a different random sample of patients take the original medication, the effectiveness of the new medicine will not be able to be determined.

Because the doctor did not have a different random sample of patients not take any medication, the effectiveness of the new cholesterol medication will not be able to be determined.

i think is 3 and 6. this took me 10 min to think.hope to and hope that my answer is brainliest.(follow me )

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

answer: integers are just whole numbers: positive, negative, and zero.

i = {-∞, -2, -1, 0, 1, 2, 3, ∞}

let x = 1st integer

let y = 2nd integer

x = 3y + 17   {equation 1}

xy = -24         {equation 2}

substitute 3y+17 in place of x n equation 2

and solve for y.

(3y+17)y = -24

3y2 + 17y = -24

3y2 + 17y + 24 = 0

from quadratic equation:

y = [-17±√(172-4(3)(24))]/(2(3))

y = (-17 ±√1)/6

y = (-17+1)/6   or     y = (-17-1)/6

y = -16/6           or     y = -18/6

y = -2 2/3         or   y = -3

since we are dealing with

y = -3

x = 3y+17 = -9+17 = 8

the integers are -3, 8

step-by-step explanation:

i don't know i don't know