Radium decays according to the function Q(t) = Qoe-
where Qrepresents the quantity remaining after tyears and k is the decay
constant 0.00043. How long will take for 500g of radium to decay to 5g?

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Using elimination, what is -4x+2y=-12 4x+8y=-24