For the first hour its 24, then 48, then 72, then 100!!!
Answer:
Answer = a. Explanatory variable: history of sleep apnea; and outcome: Alzheimer’s status.
Step-by-step explanation:
This is Case-Control analytical study where the cases are the 50 participants with Alzheimer’s and the control are the 50 participants without Alzheimer’s. This type of study requires the formulation of certain hypothesis in an attempt to investigate the possible factor (sleep apnea) of a particular health condition (Alzheimer’s disease). The outcome of the studies will explain the roles of specific factors in the incidence and prevalence of a disease. This type of study investigates the hypothesis that there is a relationship between suspected causal factor (sleep apnea: which is referred to as the explanatory variable) and a disease (Alzheimer’s disease: which is referred to as the outcome variable). The study group is selected on the basis of presence or absence of the ‘outcome variable’ which is the disease where the factors (explanatory variable) are already present or not in the case (50 participants with Alzheimer’s) and its controls (50 participants without Alzheimer’s)
This is quite simple, first, you must find the area of each shape, since the form of the prism is currently 2D.
Formula for (Area of Rectangle)= length x width
Formula for (Area of Triangle)= 1/2 base x height
Now, we have the formulas. Let’s get started!
(Identification) There are 3 rectangles and 2 triangles. 2 rectangles are of the same size and 2 triangles are of the same size.
Triangles~ the base is 6 and the height is 4.
1/2 (6 x 4) = 12
However, there’s two triangles. (of the same size)
12 x 2 = 24
Rectangles 1 and 2~ the length is 5 and the width is 7
5 x 7 = 35
However, there’s two rectangles. (of the same size)
35 x 2 = 70
Rectangle 3~ the length is 6 and the width is 7
6 x 7 = 42
There’s only one of these.
Now we add all the areas of the shapes together!
24 + 70 + 42 = 136
The surface area is 136.