12) A person who has a heart attack can be saved 90% of the time if a defibrillator is used within 5
minutes of the heart attack. Of the people that
have heart attacks, defibrillators are within the
vicinity 40% of the time; however, they are only
used 60% of the time even when they are in the
surrounding area. How many people who suffer a
heart attack are saved because of the use of a
defibrillator?
O 18%
O 22%
o 40%
0 54%
O
60%

Solve the system of equations. y= 2x y= x^2 - 15

Ahiking trail is 6 miles long. it has 4 exercise stations, spaced evenly along the trail. what is the distance between each exercise station?

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)