Answer:
$30.32
Step-by-step explanation:
381.7 ÷ 54 is used to find how many gallons you need but we know it won't be exact so we will round up the numbers.
382 ÷ 54 = 7
The answer isn't exactly 7 but in this situation, all you need to know is that it is over 7 since if the gasoline takes more than 7 gallons, you need to buy 8.
3.79 x 8 = 30.32
Sorry it took me a while to see this
Given, in the spinner 8 equal sectors, numbered 1 to 8.
So total numbers = 8.
Let, the probability of spinning a 3 is P(Three) and spinning an 8 is P(Eight).
Now we know that, probability of an event E is
P(E) = (number of outcomes in the event)/ (total number of possible outcomes).
So here number of outcomes for spinning a 3 is 1 and we have got total outcomes = 8.
So P(Three) = 
Similarly, P(Eight) = 
Probability of spinning a 3 or an 8 = P(Three) + P(Eight)
= 
As the denominator is same we can add the numerator.
= 
= 
Now we have to simplify the fraction by dividing the numerator and denominator by a common factor of them.
The common factor of 2 and 8 is 2. So by dividing them we will get,
= 
We have got the required answer.
The probability of spinning a 3 or an 8 is 
The empirical rule tells you 68% of normally-distributed observations are within 1 standard deviation of the mean.
_____
This is a number you may want to memorize, along with the numbers for 2 (95%) and 3 (99.7%) standard deviations.