Asample of an unknown chemical element naturally loses its mass over time. the relationship between the elapsed time t, in months, since the mass of the sample was initially measured, and its mass, m(t), is modeled by the following function: m(t)=120(81/625)t complete the following sentence about the rate of change in the mass of the sample. round your answer to two decimal places.
the mass of the sample decays by a factor of (3)/(5) every ? months

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: