Trisha and Angeline want to do an experiment to see an expensive brand of mouse food is better for mice than a cheaper variety. They have twelve mice that they divide into "Group A" and "Group B." They decide to keep track of the following:
the weight of each mouse, including weight change and whether the mouse is overweight or underweight
the appearance of each mouse's fur: color, glossiness, smoothness, and greasiness
the apparent energy level of each mouse: lethargic, normal, hyperactive
How can Trisha and Angeline best avoid biasing their experiment?
A.
The lab partner who is making and recording the observations should not know which group of mice is eating which food.

B.
They should choose the kind of food for each group of mice randomly each day and make sure they can't figure out which kind of food is which.

C.
They should clearly label which group of mice is getting which food so that they can compare the two groups throughout the entire experiment.

D.
They should both make observations separately and not compare them until the experiment is over.

A. The lab partner who is making and recording the observations should not know which group of mice is eating which food.

Step-by-step explanation:

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841

you'll just earn points here

step-by-step explanation: