What will it cost to carpet a rectangular floor measuring 12 feet by 30 feet if the carpet costs $ 31.95 per square yard?

Work Shown:

3 feet = 1 yard

12 feet = 4 yards (multiply both sides by 4)

30 feet = 10 yards (multiply both sides of the original equation by 10)

The carpet is 12 feet by 30 feet. This is the same as saying the carpet is 4 yards by 10 yards

Multiply the new length and width to get...

A = L*W

A = 10*4

A = 40

The area is 40 square yards. Multiply this by the cost per square yard (31.95) to get the total cost in dollars

40*31.95 = 1278

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,