Answer:
14
Step-by-step explanation:
First, find out how many half-lives have passed. Divide the number of minutes by the length of a half-life. 34÷17=22 half-lives have passed. Now figure out how much praseodymium will be left after 2 half-lives have passed. Multiply the starting amount of praseodymium by 12 a total of 2 times. 56 x 1/2 x 1/2 = 14 That calculation could also be written with exponents:56x (1/2)^2=14 After 2 half-lives, the amount of praseodymium left will be 14 grams.
Answer:
if justin races his fird 3,600meters in 60seconds, his average speed is 60 feet per second
The only line plot that has a large number of scores that are
greater than the scores in Mr. Duffy's class is choice-D .
Because his wage is $520.95, it lies between the at least 520 but less than 530 category.
He claimed one withholding allowance, so he needs to pay $54 in income tax.