Which situation is an example of an observational study?

Mathematics

2 answers:

user100 [1]3 years ago

6 0

Answer:

Step-by-step explanation:

CaHeK987 [17]3 years ago

4 0

Answer:

D- Recording the reaction time of participants in a study who were asked to press a button as soon as they see a certain picture on a screen.

Step-by-step explanation:

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Given: AC BD and AC and BD bisect each other.<br> Prove: BE EC

Goryan [66]

1) $\overline{AC} \cong \overline{BD}$ and $\overline{AC}$ and $\overline{BD}$ bisect each other (given)

2) $ABCD$ is a parallelogram (a quadrilateral with diagonals that bisect each other is a parallelogram)

3) $ABCD$ is a rhombus (a parallelgoram with congruent diagonals is a rhombus)

4) $\overline{BE} \cong \overline{EC}$ (halves of congruent segments are congruent)

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2 years ago

The Candy Factory sells candy by the pound, charging $1.60 per pound for quantities up to and including 20 pounds. Above 20 poun

rusak2 [61]

Answer:

$k=6$

Step-by-step explanation:

We have been given that the Candy Factory sells candy by the pound, charging $1.60 per pound for quantities up to and including 20 pounds. Above 20 pounds, the Candy Factory charges $1.30 per pound for the entire quantity, plus a quantity surcharge k.

$\left \{ {{p(x)=1.6x, \text{ If }x\leq 20} \atop {p(x)=1.30x+x,\text{ if }x>20}} \right.$

For the price function be to continuous at $x=20$ , the value of both functions at $x=20$ must be equal. Because a function is continuous if the right hand limit is equal to left hand limit.