Determine if the function is concave up or concave down in the first quadrant.y = x4/9
A. Concave up
B. Concave down
Answer: B
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Solve the problem. Round to the nearest cent.To start a new business, Eric invests $765.13 each month in an ordinary annuity paying 7% interest compounded monthly. Find the amount in the annuity after 5 years.
A. $55,543.01 B. $54,012.75 C. $54,777.88 D. $25,005.41
Write a word name for the whole number.70,146
A. Seven thousand, one hundred forty-six B. Seven hundred one thousand, forty-six C. Seven million, one thousand, forty-six D. Seventy thousand, one hundred forty-six
Solve the problem.Let y = -9x + 221 represent the number of students present in a large class, where x represents the number of hours of study required weekly. What is the rate of change of the number of students in the class with respect to the number of hours of study?
A. -221 students per hour of study time B. 9 students per hour of study time C. -9 students per hour of study time D. 221 students per hour of study time
Sketch the graph of the function. Label at least three points.f(x) = 
A. 
B. 
C. 
D. 