Free WGU Applied-Algebra Exam Dumps Questions & Answers

The exponential function
f(x)=280× # 1.08 # ^x
represents the number of subscribers to a blog, where xrepresents the number of years since 2003 and f(x) represents the number of subscribers.
Which statement correctly interprets the average rate of change of the number of subscribers from 2003 to
2007? Round to the nearest whole number, if necessary.

• A.The number of subscribers increases at an average rate of 25 subscribers per year.
• B.The number of subscribers decreases at an average rate of 25 subscribers per year.
• C.The number of subscribers increases at an average rate of 330 subscribers per year.
• D.The number of subscribers decreases at an average rate of 330 subscribers per year.

The graph shows the daily practice duration for a musician, where the number of days since the beginning of the month is along the horizontal axis and the number of minutes practiced per day is along the vertical axis.

What was the practice duration for day 9, based on the graph?

• A.127 minutes
• B.119 minutes
• C.117 minutes
• D.133 minutes

A factory mixes two colors, red and yellow, to create a dye.

The graph shows the relationship between the amounts of each dye, where rrepresents the amount of red dye and yrepresents the amount of yellow dye.
What is the correct interpretation of the rate of change?

• A.The amount of yellow dye must be the amount of red dye plus 9/2.
• B.The amount of yellow dye must be 2/9of the amount of red dye.
• C.The amount of yellow dye must be 9/2of the amount of red dye.
• D.The amount of yellow dye must be the amount of red dye plus 2/9.

The graph shows the number of customers, C(t), showing up to a store, where the number of hours since opening is along the horizontal axis and the number of customers showing up to the store each hour is along the vertical axis.

How can the concavity be described from t=6.2to t=10.1?

• A.The number of customers decreases slower and slower and then increases faster and faster.
• B.The number of customers increases slower and slower and then decreases faster and faster.
• C.The number of customers increases slower and slower and then increases faster and faster.
• D.The number of customers increases faster and faster and then increases slower and slower.

The figure displays the graphs of two functions representing the heights, h_1and h_2, in feet, of two balls tseconds after being launched.

Which ball was lower 0.9seconds after being launched?

• A.Ball 2, because the height of ball 1 is less than the height of ball 2 at t=0.9.
• B.Ball 2, because the height of ball 2 is less than the height of ball 1 at t=0.9.
• C.Ball 1, because the height of ball 2 is less than the height of ball 1 at t=0.9.
• D.Ball 1, because the height of ball 1 is less than the height of ball 2 at t=0.9.