PLEASE HELP NEED ANSWER ASAP

Charles deposited $12,000 in the bank.
He withdrew $5000 from his account after one year.
If he receives a total amount of $9340 after 3 years, find the rate of simple interest.

What is the distance between the points 4,10 and -3,-14 on the coordinate plane

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered