I need help with this question pleaseee

Mathematics

1 answer:

Slav-nsk [51]2 years ago

6 0

I think it’s A not sure tho :|

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The rate of discount, R, can be determined using the formula, where P is the regular price of an item and D is the discount or a

astraxan [27]

Answer:

B.0.31

Step-by-step explanation:

% of change = amount of change/original price

R=(P-D)÷P

39-27=12

12÷39=.307

≈.31

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3 years ago

if the input value is negative, is the output value of f(z)=-4z+12 always positive or always negative?

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Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

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$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$