The sample space of an experiment is changed when some additional information pertaining to the outcome of the experiment is received. The effect of such information is to <u><em>reduce</em></u><em> </em>the sample space by excluding some outcomes as being impossible which before receiving the information were believed possible . The probabilities associated with such a <u><em>reduced</em></u> sample space are called conditional probabilities.
<u><em>Knowing a student’s grade level does not help determine if he or she uses social media.</em></u>
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The given survey explains the conditional probability.
The students of the<u><em> reduced</em></u> sample space i.e. of 9th grade have the probability of 81% who use the social media.
The students of 8th grade that use social media can be greater or less than 81%.
Therefore this experiment <u><em>does not</em></u> help determine if he or she uses social media on the basis of his/her grade.
Only the <u><em>last option </em></u>is correct.
The conditional probability can be understood by the following.
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8
8 multiplied by -4 gives -32
Answer:
Below.
Step-by-step explanation:
Horizontal axis-x-axis.
Vertical axis-y-axis
Point of intersection between two axis-origin
The horizontal position of a point- the x coordinate.
The vertical position of a point- the y coordinate.
Answer:
t = -41.6
Step-by-step explanation:
To solve for the variable t, you must isolate it on one side of the equation. 
, multiply both sides of the equation by -6.5 and you will get t = 6.4 * (-6.5) or t = -41.6.
Answer: See step by step. Replace the x with theta
Step-by-step explanation: Since sin is less than zero, and secant is positive. This means the trig values are in Quadrant 4.
We know that secФ=17/15. We need to find sin,cos,tan,csc, and cot.
We can find tangent by using the identity
where x is theta.
tan x=
, Tangent in the fourth quadrant is negative so the answer is instead
We can find cotangent by taking the recipocial of tan so
We can find cos by taking reciprocal of sec remeber that cosine is positive in 4th quadrant so the answer is
We can find sin by doing quoteint identies.
To find csc, take reciprocal of sine.
