If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds?

a. one-fourth

b. half

c. one-eighth

d. you would need to know how many atoms you are starting with.

Solve for g. 8g=W 1 = 3 00 X

What is 14 divided by 365

A town has accumulated 2 inches of snow, and the snow depth is increasing by 6 inches every hour. A nearby town has accumulated 10 inches, and the depth is increasing by 2 inches every hour.

Find the sum of the geometric sequence. 1, 1/4, 1/16, 1/64, 1/256

Consider a poisson distribution with an average of 3 customers per minute at the local grocery store. If x=the number of arrivals per minute, find the expected value of x.

Turn 18 2/5 into a decimal

you invest $80 at a simple annual interest rate of 2.4% how much simple interest would you earn in 1.5 years. what would the monthly interest rate need to be to earn the same amount of intersest during the same amount of time?

What is 2.25 as a fraction

Suppose that two cards are randomly selected from a standard? 52-card deck.? (a) what is the probability that the first card is a clubclub and the second card is a clubclub if the sampling is done without? replacement??

In 5 h, you drive 400km. how much km could you drive in 1 h.