Riley worked 5 hours on monday, 3 hours on tuesday, and 2 hours on wednesday. he rounded the hours to 5, 3, and 2 before adding them together to get 10 hours. did he make a high or low estimate?

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.

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?

Which graph represents an exponential decay function?