In order to figure this out, we can set up a proportion and simplify using cross multiplication.
One grapefruit costs 89 cents.
One grapefruit costs 89 cents.
You ride your skateboard to school and tell all your friends you rode at a speed of 25 mph. They know this cannot he true becaus
e they know
A. When you left the house and when you arrived at school
B. How far school is from your house and what time school starts
C. The distance between your house and school and how long it took you to get there
D. The distance between school and your house and the direction you traveled.
A. When you left the house and when you arrived at school
B. How far school is from your house and what time school starts
C. The distance between your house and school and how long it took you to get there
D. The distance between school and your house and the direction you traveled.
1 answer:
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a. Let be a random variable representing the weight of a ball bearing selected at random. We're told that
, so
where . This probability is approximately
b. Let be a random variable representing the weight of the
-th ball that is selected, and let
be the mean of these 4 weights,
The sum of normally distributed random variables is a random variable that also follows a normal distribution,
so that
Then
c. Same as (b).
Answer:
Explanation:
The number of emails is multiplied by <em>4</em> every <em>9.1 weeks.</em>
Thus, since <em>Tobias initially sent the chain letter to 37 friends</em>, the number of letters will grow as per this geometric series:
Start: 37 letters
- In 9.1 weeks: 37 × 4
- In 2 × 9.1 weeks: 37 × (4)²
- In 3 × 9.1 weeks: 37 × (4)³
As you see, the exponent is the number of weeks divided by 9.1
Thus, if your variable is the number of weeks, t, then the exponent is t/9.1
And the exponential function, P(t) will be: