PLEASE HELP HURRY ILL MARK BRAINLEST

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate