Identify the type of observational study (cross-sectional, retrospective, or prospective) described below. A research company uses a device to record the viewing habits of about 25002500 households, and the data collected todaytoday will be used to determine the proportion of households tuned to a particular children's children's program.. Which type of observational study is described in the problem statement

cross-sectional study

Step-by-step explanation:

Here, A research company uses a device to record the viewing habits of about 2500 households (that includes different persons such as adults , children and seniors )

The data collected today(at a single point in time).

If it is used to determine the proportion of households tuned to a particular children's children's program.

The type of observational study is described in the problem statement : "cross-sectional"

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.

1; 35 is the ratio

step-by-step explanation: