A cardiac monitor is used to measure the heart rate of a patient after surgery. It compiles the number of heartbeats after t minutes. When the data in the table are graphed, the slope of the tangent line represents the heart rate in beats per minute. The monitor estimates this value by calculating the slope of a secant line. Use the data to estimate the patient's heart rate after 42 minutes using the secant line between the points with t=38 and t=42.
Select the correct answer.
a. 74
b. 80
c. 85
d. 70
e. 76
f. 75
f. 75
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Solve the problem.Two distinct even numbers are selected at random from the first ten even numbers greater than zero. What is the probability that the sum is 30?
A. 
B. 
C. 
D. 
Evaluate the expression for the given replacement values.(x + 4y)2
x = 3, y = 2
A. 49 B. 121 C. 22 D. 11
Solve the problem.Below is a diagram of a water slide. The slide is 26 ft long. The ladder leading to the slide is 19 ft long. How far is it from the end of the slide to the foot of the ladder? Round your answer to the nearest thousandth if necessary. 
?
A. 157.5 ft B. 8.874 ft C. 22.5 ft D. 17.748 ft
Solve the system.
A. x = 0, y = -6, z = 1 B. x = 0, y = 6, z = -1 C. x = 3, y = 0, z = -4 D. x = -3, y = 0, z = 4