schools the information below represents the fall enrollment of students (in millions) in grades k - 8 for…
schools the information below represents the fall enrollment of students (in millions) in grades k - 8 for public and private schools.\n|year|1980|1985|1990|1995|\n|----|----|----|----|----|\n|public school|27.6|27.0|29.9|32.4|\n|private school|4.0|4.2|4.1|4.4|\nin exercises 7 and 8, decide whether each statement is true or false based on the table.\n7. the ratio of public to private enrollment has decreased overall from 1980 through 1995.\n8. the total number of students has increased.\n9. construct a bar graph of the combined enrollment for public and private schools.\nbusiness the table represents a company’s revenue and expenses (in thousands of dollars) for six months.\n|month|july|aug.|sept.|oct.|nov.|dec.||----|----|----|----|----|----|----|\n|revenue|48|39|36|42|57|62|\n|expenses|38|58|54|48|37|51|\n10. in what month were the expenses the greatest?\n11. profit is the difference of revenue and expenses. what was the company’s profit in november?\n12. construct a line graph of the company’s revenue.\n13. was it a profitable six months for the company? explain.\nlife expectancy in exercises 14 and 15, use the information in the table, which gives the life expectancy in the united states for a child (at birth).\n|year|1930|1940|1950|1960|1970|1980|1990|2000|\n|----|----|----|----|----|----|----|----|----|\n|life expectancy (years)|59.7|62.9|68.2|69.7|70.8|73.7|75.4|76.4|\n14. in which decade did life expectancy increase the most?\n15. construct a line graph of these data and discuss what the line graph shows.
Answer
7.
Explanation:
Step1: Calculate ratio in 1980
In 1980, ratio of public to private enrollment is $\frac{27.6}{4.0}=6.9$.
Step2: Calculate ratio in 1995
In 1995, ratio of public to private enrollment is $\frac{32.4}{4.4}\approx7.36$.
Step3: Compare ratios
Since $7.36>6.9$, the ratio has increased. So the statement is false.
Answer:
False
8.
Explanation:
Step1: Calculate total enrollment in 1980
In 1980, total enrollment is $27.6 + 4.0=31.6$ (in millions).
Step2: Calculate total enrollment in 1995
In 1995, total enrollment is $32.4+4.4 = 36.8$ (in millions).
Step3: Compare totals
Since $36.8>31.6$, the total number of students has increased. So the statement is true.
Answer:
True
10.
Explanation:
Step1: List expenses values
Expenses values are 38, 58, 54, 48, 37, 51 for July - Dec respectively.
Step2: Find maximum value
The maximum value among these is 58 which corresponds to August.
Answer:
August
11.
Explanation:
Step1: Identify November revenue and expenses
In November, revenue is 57 (in thousands of dollars) and expenses is 37 (in thousands of dollars).
Step2: Calculate profit
Profit = Revenue - Expenses, so profit in November is $57 - 37=20$ (in thousands of dollars).
Answer:
20 (in thousands of dollars)
13.
Explanation:
Step1: Calculate total revenue
Total revenue = $48 + 39+36 + 42+57+62=284$ (in thousands of dollars).
Step2: Calculate total expenses
Total expenses = $38+58 + 54+48+37+51=286$ (in thousands of dollars).
Step3: Compare total revenue and expenses
Since $284<286$, total expenses are greater than total revenue. So it was not a profitable six - months.
Answer:
No, because total revenue ($284$ thousand dollars) is less than total expenses ($286$ thousand dollars).
14.
Explanation:
Step1: Calculate increase in each decade
From 1930 - 1940: $62.9 - 59.7 = 3.2$. From 1940 - 1950: $68.2 - 62.9 = 5.3$. From 1950 - 1960: $69.7 - 68.2 = 1.5$. From 1960 - 1970: $70.8 - 69.7 = 1.1$. From 1970 - 1980: $73.7 - 70.8 = 2.9$. From 1980 - 1990: $75.4 - 73.7 = 1.7$. From 1990 - 2000: $76.4 - 75.4 = 1.0$.
Step2: Find maximum increase
The maximum increase is 5.3 which is from 1940 - 1950.
Answer:
1940 - 1950