Solve the following: 1. You find a skull in a nearby tribe ancient burial site and with the help of a
spectrometer, you discovered that the skull contains 9% of the C-14 found in a
modern skull. Assuming that the half-life of C-14 (radiocarbon) is 5,730 years, how
old is the skull?
2. Suppose that the population of a colony of bacteria increases exponentially. At the
start of an experiment, there are 10,000 bacteria, and one hour later, the
population has increased to 10,500. How long will it take for the population to
reach 25,000? Round off your answer to the nearest hour.​

Ask google i believe they can you with that question

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!