1) Doctors have two methods of calculating maximum heart rate. With the first method, maximum heart rate, y, in beats per minute
is y=220 - X, where x is the person's age. Maximum heart rate
with the second method is shown in the table. (Example 1)
Age, x
Heart rate (bpm), y
20
194
30
187
40
180
50
173
60
166
Hint: y = 220 - x is like writing y = -x + 220
a) which method gives a greater maximum heart rate for a 70 year old?
b) Are heart rate and age proportional or non proportional for each method?
2)

The jones farm has 24 cows that each produce 52 quarts of milk a day. how many quarts are produced each day altogether

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?