A radioactive substance decays exponentially. A scientist begins with 200 milligrams of the radioactive substance. After 31 hours, 100 mg of the substance remains. How many milligrams remain after 43 hours? Please be as descriptive as possible

2x minus y equals 6, x plus y equals negative 3

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year