The half-life of Carbon-14 is 5730 years. Suppose a fossil is found with 50% of Carbon-14 as compared to a living sample. How old is the fossil?
a) 572 years
b) 57 years
c) 5730 years
d) 5728 years

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

What is the solution to the equation e3x=12? round your answer to the nearest hundredth

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.