Points if you answer this

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.