The rising college costs from 2000 through 2014 can be modeled by the formula T = 394x + 3123, where T represents the average cost of tuition and fees at public four-year colleges for the school year ending x years after 2000. So, when will tuition and fees top $10,000 and reach $10,215? Substitute 10,215 for T in the formula T = 394x + 3123: 10,215 = 394x + 3123.

The acreage of soybean planted in the United States from 1980 to 2006 can be modeled by A = -0.0058 +3 -0.29 +2 +100t+2900 where A is the amount of acres (in millions) of soybean planted and t is the number of years since 1980. How much planting space was there in 1992? Round your answer to 3 decimal places. Number million acres.

Find the annual rate per cent that earns $234 simple interest when $900 is invested for 6, years.

Tacoma's population in 2000 was about 200 thousand, and has been growing by about 9% each year. If this continues, what will Tacoma's population be in 2017?   people

From 1964 to 2014, a certain money stock measure was growing at the rate of approximately 92e0.57x billion dollars per decade, where x is the number of decades since 1964. Find the total increase in the money stock measure from 1964 to 2014. (Round your answer to the nearest billion dollars.) billion

Let y represent the total cost of publishing a book (in dollars). Let x represent the number of copies of the book printed. Suppose that x and y are related by the equation 1150 +10x=y. Answer the questions below. Note that a change can be an increase or a decrease. For an increase, use a positive number. For a decrease, use a negative number. What is the change in the total cost for each book printed? What is the cost to get started (before any books are printed)? $0 X S

The producers of a new television show expect the number of viewers (in thousands) to increase at a rate of 100 + 10x, where x is the number of weeks after the show premiers. Find the total increase in viewers in the first seven weeks.

The percent of high school students who smoked cigarettes on 1 or more of the 30 days preceding the survey is given by y = -0.064x² +0.277x +33.715, where x is the number of years after 1990. During what years from 1990 on is the percent greater than 30%? From to the percent is greater than 30%. (Round up to the nearest year as needed.)

A house is worth $125,000 when it is 2 years old and $135,150 when it is 7 years old. What is a formula, in slope-intercept form, that models this situation?

Using U.S. Bureau of Labor Statistics data for selected years from 1950 and projected to 2050, the number of men in the U.S. workforce(in millions) can be approximated by ? = 0.59? + 43.2 where x equals the number of years past 1950. Find the projected number of men in the U.S. workforce in 2050 according to this model.