Answer:
Step-by-step explanation:
I'm assuming you need the age of the bowl. Start with the fact that you have remaining 28% of the original amount before any of it decayed. You always start with 100% of something unless you're told differently. That means that the equation looks like this:
and begin by dividing both sides by 100 to get
. To solve for t we have to be able to bring it down from its current position of exponential. To do this we would either take the log or the natural log since the rules for both are the same. However, the natural log is the inverse of e, so they undo each other. We take the natural log of both sides which allows us to pull down the -.0001t. At the same time remember that the natural log and e are inverses of each other so they are both eliminated when we do this.
ln(.28) = -.0001t Now it's easy to solve for t.
and
so
t = 12729.65676 years or rounded, 12730 years.
Answer:
this is right
Step-by-step explanation:
i just took the test and it was B!
Orlando's poster's length is 1 meter - 0.55 meter = 0.45 meter.
Amanda's " " " 0.85 meter
The difference in the lengths of their posters is (0.85 - 0.45) meter = 0.40 meter.
Answer:
124.75
Step-by-step explanation:
Lets X be aleatory variable for iq scores. Here, wee need a value α such that, the probability that X is greater than α is higher than 0.95. This is:
P(X > α)=0.95
As X distributes normal, if we subtract the mean and divide y its std. dev. it will distribute normal with mean 0 and sts. dev. 1, which permits us to use the normal distribution table to solve it. Doing so:
P([X - 100]/15 > [α-100]/15)=0.95
Using the normal table, we need to look for the value that gives us a probability on 0.95, an it it 1.65.
So, 1.65 must be equal to [α-100]/15 :
1.65 = [α-100]/15
Multiplying both sides by 15:
24.75 = α-100
Summing 100 in both sides:
124.75 = α
So, for scores equals or greater to 124.75 you will be in the top 5% scores.
Answer: 56
Step-by-step explanation:
check on google if this answer is wrong
