Mathematics, 05.02.2020 12:42 mazielynn84

Aradioactive substance has a half-life of 5 million years. what is the age of a rock in which 25% of the original radioactive atoms remain?
choose one answer.
a. 2.5 million years
b. 5 million years
c. 15 million years
d. 10 million years

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 13:30, istangot7

Adaylily farm sells a portion of their daylilies and allows a portion to grow and divide. the recursive formula an=1.5(an-1)-100 represents the number of daylilies, a, after n years. after the fifth year, the farmers estimate they have 2225 daylilies. how many daylilies were on the farm after the first year?

Answers: 2

continue

Mathematics, 21.06.2019 21:00, Neko1kat

Solve this problem! extra ! 3025/5.5 = a/90.75

Answers: 1

continue

Mathematics, 21.06.2019 21:30, bm42400

Mario is constructing a frame for 10 in. by 8 in. photo. he wants the frame to be the same with all the way around in the same area of the frame and photo to be 120 square inches what is the dimension of the frame?

Answers: 1

continue

Mathematics, 22.06.2019 00:00, chaseking120418

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0

Answers: 3

continue

You know the right answer?

Aradioactive substance has a half-life of 5 million years. what is the age of a rock in which 25% of...