3. If Sara's heartbeat on average is 54 beats per minute, how many times will her heart beat in 5 years?
a. 270 beats
c. 2525345689 beats
b. 123456789 beats
d. 141912000 beats

its d

Step-by-step explanation:

54×60=3240

3240×24=77760

77760×365=28382400

28382400×5=141912000

thus it is D

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).