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Solve the proportion

Math

Solve the proportion. Round to the nearest hundredth.
3
y
 = 
7

40

 

2. 

Solve the proportion. Round to the nearest hundredth.
0.5
2.2
 = 
b
20

 

3. 

A management consulting firm recommends that the ratio of middle-management salaries to management trainee salaries be 4:3. Using this recommendation, what is the annual middle-management salary (in dollars) if the annual management trainee salary is $45,000?
The dosage of a cold medication is 2 mg for every 80 lb of body weight. How many milligrams of this medication are required for a person who weighs 140 lb?
A survey of 1,137 adults nationwide asked, "What irks you most about the actions of other motorists?" The response "tailgaters" was given by 296 people. What percent of those surveyed were most irked by tailgaters? Round to the nearest tenth of a percent.
Approximately 1,540,000 oz of gold went into the manufacturing of electronic equipment in a certain country in 1 year. This was 14% of all the gold mined in that country that year. How many ounces of gold were mined in that country that year?
A certain online survey asked people how they planned to use their tax refunds. Seven hundred twenty people, or 22% of the respondents, said they would save the money. How many people responded to the survey? (Round your answer to the nearest whole number.)
The following table shows the estimated number of millionaire households (households with a net worth of at least $1 million, not including primary residence) in a certain country for selected years.
Year Millionaire Households
2015 9,100,000
2016 9,370,000
2017 9,620,000
2018 9,980,000
(a)
What is the percentage increase in the estimated number of millionaire households from 2017 to 2018? Round to the nearest tenth of a percent.
 %
(b)
If the percentage increase between 2017 and 2018 continued for 2018 and 2019, how many millionaire households would there be in 2019? Round to the nearest ten thousand.
 millionaire households
Using the figure below, find the percentage increase in the federal debt from 2005 to 2015. Round to the nearest tenth of a percent. (See Example 8 in this section.)

A bar graph has the horizontal axis labeled "Years" and the vertical axis labeled "Federal debt (in trillions of dollars)." There are five bars. The years and corresponding bar heights for these five bars are as follows.
  • The bar at 2000 has height 5.63.
  • The bar at 2005 has height 7.91.
  • The bar at 2010 has height 13.53.
  • The bar at 2015 has height 18.12.
  • The bar at 2020 has height 22.5, which is labeled "estimated."
    During a recent year, charitable contributions in the United States totaled $370 billion. The following graph shows to whom this money was donated.

    8%
    15%
    32%
    45%
    A circle graph titled "Recipients of charitable contributions in the United States" has 4 unequal sectors. The 4 sectors are labeled as follows.
    • Religion, 32%
    • Health, 8%
    • Education, 15%
    • Other, 45%
    Determine how much money (in billions of dollars) was donated to religious organizations.

 

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