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A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. (This 10% result is
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1. A student raises her grade average from a 75 to a 90. What was the percent of increase in the student’s grade average? Round your answer to the nearest tenth of a percent, if necessary. A: 20% B: 16.7% C: 8.3% D: 15% *** 2.
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asked by Rochelle on October 11, 2014 
Math help ms sue.
1. What is 57% of 11? (1 point) 11 = 0.57 • n; 19.3 n = 57 • 11; 627 n = 0.57 • 11; 6.27 11 = 57 • n; 0.19 2. 224 is 25% of what number? (1 point) 224 • 0.25 = w; 560 224 = 0.25 • w; 896 224 • 0.25 = w; 56 224 = 0.25
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1. Find the circumference of the given circle. Round to the nearest tenth. (Circle with radius of 3.5 cm) 22.0 cm 38.5 cm 11.0 cm 42.8 cm 2. Find the area of the given circle. Round to the nearest tenth. (Circle with a
asked by Shadows on January 19, 2020

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Write 16/75 as a percent. Round your answer to the nearest tenth of a percent. 21.3% 2.13% 4.7% 59%••
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Find the percent of markup. Round to the nearest tenth. $37.00 to $49.00 24.5% 32.4%**** 27.7% 12.0%
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1.what is the area of a sector with a central angle of 160 degrees and a diameter of 5.8m? round the answer to the nearest tenth A. 8.1 m^2 B.4.0 m^2 C.47.0 m^2 D.11.7 m^2 2.what is the area of a regular octagon with a side of 8
asked by studyguy on April 23, 2014 
7th grade math Ms. Sue please
Multiple Choice Use an equation to solve the problem. 1. What is 57% of 11? (1 point) 11 = 0.57 • n; 19.3 n = 57 • 11; 627 n = 0.57 • 11; 6.27 11 = 57 • n; 0.19 2. 224 is 25% of what number? (1 point) 224 • 0.25 = w; 560
asked by Delilah on November 28, 2012 
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Suppose a costbenefit model is given by y=2771x/100x, where y is the cost for removing x percent of a given pollutant. What percent of pollutant can be removed for $36,000? Round your answer to the nearest tenth of a percent?
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A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have the virus. (This 5% result is
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