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Taya2010 [7]
3 years ago
6

Jess owns 4 red shirts, 5 blue shirts, and 3 white shirts. She chooses a shirt to wear at random. What is the probability that s

he chooses a white shirt?
A.
B.
C.
D.
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
7 0
D is the answer because in total she has 12 shirts and 3 out of the twelve shirts are white. so find the percentage of 3/12 which i belive is 1/4 
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A person standing at the edge of a cliff throws a rock upward from a height of 180ft above ground level with an initial velocity
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Answer: 8.73 ft/s

Step-by-step explanation:

We have the following equation that models the motion of the rock:

h(t)=-16t^{2}+64t+180

Where h(t) is the height of the rock at a time t.

Now, if  h(t)=48 ft we can find t and then the velocity of the rock at that height:

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Multiplying the equation by -1:

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Solving with the quadratic formula t=\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}  , where a=16, b=-64, c=-132 .

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Choosing the positive result of the equation:

t=5.5 s  

Since velocity V is defined as the traveled distance h(t) in a given time t, we have:

V=\frac{h(t)}{t}

V=\frac{48 ft}{5.5 s}

V=8.727 ft/s \approx 8.73 ft/s This is the velocity of the rock at the height of 48 feet

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3 years ago
In the following figure, m∠A = 55° and the m∠ACE = 86° . What is the m∠E = ? Show your work.
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