The left ventricle of an average person can pump about 315 liters of blood in one hour. a: estimate to find how many liters of blood the left ventricle can pump in one minute hint there are 60 minutes in an hour. b: the left ventricle pumps blood away from the heart into your body's largest artery, the aorta. about how much blood is pumped into the aorta in 10 minutes

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Simplify using positive exponents only.