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Allisa [31]
3 years ago
9

What is the expected value of the random variable with the given probability distribution? If necessary, round your answer to th

e nearest hundreth.
A) 0.62
B) 1.62
C) 3.70
D) 4.33

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
4 0
ANSWER: D)4.33




EX: 4.33
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The function h(t) = −16t2 + 24t models the height, in feet, of a kangaroo t seconds after it jumps. What is the maximum height o
ch4aika [34]
<h2>9 ft</h2>

Step-by-step explanation:

       The height of kangaroo after it jumps is represented by the function h(t)=24t-16t^{2}, where t is in seconds, height is in feet.

       To find the maximum height that the kangaroo jumps, we need to maximise h(t).

       The minimum/maximum value of a quadratic expression ax^{2}+bx+c is given by \dfrac{4ac-b^{2}}{4a}.

       As the coeffecient of quadratic term is negative, the function has a maxima.

       Maximum value = \dfrac{4(-16)(0)-(24)^{2}}{4(-16)}=\dfrac{-576}{-64}=9.

∴ Maximum height = 9 ft

6 0
3 years ago
Glen hiked 14 miles in 4 hours what was his average rate of speed and the formula to use
Anna [14]

Answer:

3.5 mph

Step-by-step explanation:

Average rate of speed

=  \frac{distance}{time}  \\  \\  =  \frac{14}{4}  \\\\  = 3.5 \: miles \: per \: hour

3 0
3 years ago
What is 35 million in scientific notation
Alchen [17]
This should be the answer
3.5 x 10^7
4 0
3 years ago
7n + 5 =68.... how to solve this problem and show my work​
mart [117]

Answer:

n=9

Step-by-step explanation:

7n+5=68  Subtract 5 on both sides.

    <u>-5  -5</u>

7n=63       Divide both sides by 7.

<u>/7   /7</u>

n=9

Hope this helps! Have a nice day ^^

7 0
3 years ago
Read 2 more answers
Tim's phone service charges $26.60 plus an additional $0.25 for each text message sent per month. if tim's phone bill was $32.85
Murljashka [212]
$26.60 + $0.25t= $32.85

To Solve:
$26.60 + $0.25t= $32.85
$26.60 - $26.60+ $0.25t= $32.85 - $26.60
$0.25t  = $6.25
$0.25t/$0.25 = $6.25/ $0.25
t= 25



6 0
3 years ago
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