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vlada-n [284]
3 years ago
5

Monica read 7 1/2 pages of a mystery book and nine minutes. What is her average reading rate in pages per minute?

Mathematics
2 answers:
SpyIntel [72]3 years ago
5 0
To do this you simply do 7 1/2 pages divided by 9. This gives you an average of .83 (with the three repeating) pages per minute. This is 5/6 as a fraction.
Andrew [12]3 years ago
3 0
Her average page per minute is 1.125  pages
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anygoal [31]

Answer:

9 seconds

Step-by-step explanation:

The complete question is

The altitude of an object, d, can be modeled using the equation below:

d=-16t^2 +vt+h

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Let

d ----> the altitude of an object in feet

t ---> the time in seconds

v ---> initial velocity in ft per second

h ---> initial height of an object in feet

we have

d=-16t^2 +vt+h

we  know that

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we have

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substitute the values and solve for t

0=-16t^2 +(90)t+486

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The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

a=16\\b=-90\\c=-486

substitute in the formula

t=\frac{90(+/-)\sqrt{-90^{2}-4(16)(-486)}}{2(16)}

t=\frac{90(+/-)\sqrt{39,204}}{32}

t=\frac{90(+/-)198}{32}

t_1=\frac{90(+)198}{32}=9\ sec

t_2=\frac{90(-)198}{32}=-3.375\ sec

the solution is t=9 sec

see the attached figure to better understand the problem

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Step-by-step explanation:

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