Mark the number sentences that are correct. Group of answer choices

60 x 15 = (6 x 10) + (6 x 5)

99 x 11 = (1 x 9) + (1 x 90) + (10 x 9) + (10 x 90)

37 x 22 = (30 x 20) + (30 x 20) + (7 x 20) + (7 x 20)

18 x 42 = (10 x 40) + (10 x 2) + (8 x 40) + (8 x 2)

Which graph represents the following piecewise defined function?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.