how many years is in a decade

A decade is a period of 10 years..

The bar graph shows the population of Texas at the end of every decade from 1910 through 1950. Find the ratio of the population in the year 1920 to that in the year 1940. => 4 : 5 or 3 : 1 or 1 : 3 or 5 : 4..

The double line graph displays the annual income and expenditure of ABC Inc. during the last decade. In which year did the income equal expenditure? => 1994 or 1998 or 2001 or 1999..

The line graph shows the number of girls and boys enrolled in a school in the past five decades. In which year was the number of girls enrolled equal to the number of boys in the school? => 1980 or 1950 or 1960 or 1970..

From 1980 to 2000, the price of crude oil increased by $4 per barrel per decade. In the year 2000, the price of crude oil was $20. What was the price of the crude oil per barrel in the year 1990? => $20 or $26 or $24 or $16..

From 1980 to 2000, the price of linseed oil increased by $2 per gallon per decade. In the year 2000, the price of linseed oil was $38 per gallon. Write a linear model for the price per gallon of linseed oil over the number of decades. Let p represent the price per gall..

From 1980 to 2000, the price of crude oil increased by $4 per barrel per decade(10 years.) In the year 2000, the price of crude oil was $60. Write a linear model for the price per gallon of crude oil, p over the number of decades t . => p = 52 t - 4 or p = 4 ..

Select the statements where descriptive statistics is used. I. Increase in the annual sales of hamburgers in the district was 30% of the sales of previous year. II. Infant morality rate in an underdeveloped country registered a drop of 10% during the last decade. III. Defence ac..

From 1980 to 2000, the price of crude oil increased by $3 per barrel per decade. In the year 2000, the price of crude oil was $40. Write a linear model in point-slope form for the price of the crude oil per barrel. What was the price of the crude oil per barrel in the yearh..

The population of an island in the last 4 decades is shown in the table. Determine the mean population on the island during the time period. Year Population 1960 58000 1970 84000 1980 103000 1990 135000 => 96200 or 98400 or 93800 or 95000..