anonymous
  • anonymous
help!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@Michele_Laino
anonymous
  • anonymous
Remo needs to buy a countertop for a bathroom. He calculated the area as 10 square feet. The actual area is 9.5 square feet. What is Remo's percentage error? 0.5% 0.95% 5% 5.26%
Michele_Laino
  • Michele_Laino
by definition, the percentage error, is: \[\large \frac{{10 - 9.5}}{{9.5}} \cdot 100 = ...?\]

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More answers

anonymous
  • anonymous
90
Michele_Laino
  • Michele_Laino
I'm sorry, it is wrong
anonymous
  • anonymous
5.26315789474
anonymous
  • anonymous
D?
Michele_Laino
  • Michele_Laino
correct! 5.26%
anonymous
  • anonymous
1 Attachment
Michele_Laino
  • Michele_Laino
here is the general definition, for percentage error \epsilon: \[\Large \varepsilon = \frac{{{\text{measured value}} - {\text{actual value}}}}{{{\text{actual}}\;{\text{value}}}} \cdot 100\]
Michele_Laino
  • Michele_Laino
the requested unit rate is: space/time, namely: \[\huge r = \frac{{3/8}}{{3/5}} = \frac{3}{8} \cdot \frac{5}{3} = ...?\]
anonymous
  • anonymous
15 / 24
Michele_Laino
  • Michele_Laino
you can simplify your fraction please
anonymous
  • anonymous
5/8
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
A?
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
A package of pencils cost $6.25 per set at an office supply store. Which equation can be used to determine the price, P, of n sets of these pencils? n = 6.25P P = 6.25n n equals 6.25 over P P equals 6.25 over n
Michele_Laino
  • Michele_Laino
total cost for n set is: cost for one set multiplied by the number of set
anonymous
  • anonymous
b?
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
An oil company fills 1 over 12 of a tank in 1 over 4 hour with gasoline. At this rate, which expression can be used to determine how long will it take for the tank to fill completely? 1 over 4 ⋅ 1 over 12 1 over 12 ⋅ 4 1 over 4 ⋅ 12 12 ⋅ 4 @Michele_Laino
Michele_Laino
  • Michele_Laino
the filling rate r is: \[\Large r = \frac{{1/12}}{{1/4}} = \frac{1}{{12}} \cdot \frac{4}{1} = ...?\]
anonymous
  • anonymous
4/12 which can be simplified to 1/4
Michele_Laino
  • Michele_Laino
4/12 which can be simplified to 1/3
anonymous
  • anonymous
oh sorry its 1/3
Michele_Laino
  • Michele_Laino
that means I am able to fill 1 tank every 3 hours, right?
anonymous
  • anonymous
right
Michele_Laino
  • Michele_Laino
so what is the right option?
anonymous
  • anonymous
c?
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
Which unit rate is equivalent to 19 miles per gallon? three gallons over fifty seven miles fifty seven miles over three gallons thirty seven miles over four gallons four gallons over thirty seven miles
Michele_Laino
  • Michele_Laino
hint: \[\Large \frac{{19}}{1} = \frac{{19 \times 3}}{{1 \times 3}} = ...?\]
anonymous
  • anonymous
57/3
anonymous
  • anonymous
@Michele_Laino
anonymous
  • anonymous
b?
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
b?
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
true?
Michele_Laino
  • Michele_Laino
hint: \[\Large \begin{gathered} 8 = 2 \cdot 4 \hfill \\ 12 = 3 \cdot 4 \hfill \\ 16 = 4 \cdot 4 \hfill \\ 20 = 5 \cdot 4 \hfill \\ \end{gathered} \]
anonymous
  • anonymous
8 12 16 20
Michele_Laino
  • Michele_Laino
I know, lol
anonymous
  • anonymous
oh ok
Michele_Laino
  • Michele_Laino
are those numbers proportional each to others?
anonymous
  • anonymous
yes
Michele_Laino
  • Michele_Laino
so, what is the right option?
anonymous
  • anonymous
true
Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
1 Attachment
Michele_Laino
  • Michele_Laino
hint: (0,0) means that 0 fine is due if the DVD is returned by the due date
anonymous
  • anonymous
c?
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
Silva set up a dog-walking business. He earned $60 in June. He is projected to earn 110% more in July. How much is Silva projected to make in July? $126 $170 $176 $660
Michele_Laino
  • Michele_Laino
it is simple, the requested amount of money is: \[\Large 60 + \left( {\frac{{110}}{{100}} \cdot 60} \right) = ...?\]
anonymous
  • anonymous
i got A
Michele_Laino
  • Michele_Laino
that's right!

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