Answer:
half of the atoms of an unstable isotope to go through radioactive decay. ... amount of a sample will be left after a certain amount of time, or it can tell us how long has ... If the sample contained 510 grams, how much chromium would remain ... 5) Titanium-51 decays with a half-life of 6 minutes. ... How many grams of bismuth-.
Step-by-step explanation:
We are dealing here with a uniform distribution ranging from 0 to 30 minutes. We need to calculate the probability that the unreliable bus will arrive before the reliable one. This probability is the area under the uniform distribution "curve" from 0 to 10 minutes. This constitutes 1/3 of the entire unform distr. curve. So the probability that the unreliable bus will arrive before the reliable one is 1/3, or 0.33. The probability that it will arrive AFTER the reliable bus is 2/3, or 0.67.
Answer:
= (x + 5)(x - 9)
Step-by-step explanation:
You don't need to use the distributive property because there is nothing to distribute, so all you need to do is combine like terms, and they are like terms because they have the same variable to the same power/exponent which is 1.
To combine fractions (by addition or subtraction), they need to have the same denominator. To do so, you can find the least common multiple of 2 and 4, unless you already know what number 2 and 4 have in common, which is 4.
Multiply by to make the denominator = 4
Now combine the like terms
You can put the -4 and -9 together and put it at the end to make the new sequence 4-13 which would leave you with -9