Harumatsu8019 Harumatsu8019

06-07-2024
Mathematics

Answered

In a radioactive decay experiment, a sample of an unknown substance originally measured at 376.5 ng decreased to 47.06 ng after 47 days. How many half-lives of the substance occurred during this period?
A) 2.5
B) 3
C) 3.5
D) 4

Answer :

Other Questions

Which function is negative for the interval [tex]$[-1,1]$[/tex]?

A bean plant grows at a constant rate for a month. After 10 days, the plant is 25 centimeters tall. After 20 days, the plant is 45 centimeters tall.Which equati

What is the main element that stars are made of?A. helium B. hydrogen C. magnesium D. sodium

Find the length of [tex]$7x$[/tex].Answer: [tex]\square[/tex]

12. When was the Internal Revenue Service (IRS) organized into its current form?A. 1913 B. The Civil War C. 1950s D. 1990s

Which of the following genetic immunodeficiencies involve B cells?A. Selective immunoglobulin A deficiency, agammaglobulinemia, and severe combined immunodefici

Find the missing probability.[tex]\[ P(A)=\frac{7}{20}, \; P(B)=\frac{3}{5}, \; P(A \cap B)=\frac{21}{100}, \; P(A \cup B)=\;? \][/tex]A. [tex]\(\frac{7}{50}\)[

3 pipes of the same size can fill a cistern in 90 mins. (I) How long would 1 pipe take to fill the cistern

The proof that the point [tex]\((1, \sqrt{3})\)[/tex] lies on the circle centered at the origin and containing the point [tex]\((0,2)\)[/tex] is found in the ta

A rotating-beam test specimen made from AISI 4130 steel quenched and tempered to 205 degrees celsius. Estimate the fatigue strength corresponding to a life of 1