Solve the problem.Before exercising, an athlete measures her air flow and obtains a = 0.65 sin 
where a is measured in liters per second and t is the time in seconds. If a > 0, the athlete is inhaling; if a < 0, the athlete is exhaling. The time to complete one complete inhalation/exhalation sequence is a respiratory cycle. What is the amplitude? What is the period? What is the respiratory cycle? Graph a over two periods beginning at t = 0. 
What will be an ideal response?
amplitude = 0.65, period = 5, respiratory cycle = 5 seconds
a = 0.65sin  |
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Solve the equation for the indicated variable.4r + 1 = 4s for r
A. s - 
B. 
C. s - 1
D. 
Set up the general equation from the given statement.The safe load on a beam ? with a rectangular cross section that is supported at each end varies jointly as the product of the width W and the square of the depth D and inversely as the length L of the beam between the supports.
A. 
B. 
C. 
D. 
According to Linchevski and Kutscher's (1998) study, which student grouping strategy is LEAST likely to be effective?
a. Placing all ninth-grade students in the same level algebra class. b. Creating three separate levels of ninth-grade algebra and placing students in them on the basis of grades from eighth-grade mathematics (students with low grades go in first section, mid-level grades in another, and high grades in another). c. Placing students in cooperative learning groups while solving problems in ninth-grade algebra classes. d. Having students work in pairs when going over the homework assignment from the previous day.
Find an equation of the line containing the given pair of points(-3, 10) and (2, -7)
A. y = 
x - 
B. y = 
x - 
C. y = - 
x - 
D. y = - 
x - 