On a road trip, you notice your gas tank is 1/4 full, the gas tank can hold 18 gallons, and the vehicle averages 22 miles per ga
1 answer:
Answer:
You will run out of gas before you reach your destination
Step-by-step explanation:
we know that
The gas tank can hold 18 gallons
Your gas tank is 1/4 full
so
The total gas in the car is
The vehicle averages 22 miles per gallon
so
To find out the number of miles, multiply 22 miles per gallon by 4.5 gallons
Compare
therefore
You will run out of gas before you reach your destination
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Answer:
The sequence is geometric. The recursive formula is
Step-by-step explanation:
In order to solve this problem, you have to calculate the amount of the substance left after the end of each year to obtain a sequence and then you have to determine if the sequence is arithmetic or geometric.
The substance decreases by one-third each year, therefore:
After 1 year:
Using 1452 as a common factor and solving the fraction:
You can notice that in general, after each year the amount of grams is the initial amount of the year multiplied by 2/3
After 2 years:
After 3 years:
The sequence is:
1452,968,1936/3,3872/9....
In order to determine if the sequence is geometric, you have to calculate the ratio of two consecutive terms and see if the ratio is the same for all two consecutive terms. The ratio is obtained by dividing a term by the previous term.
The sequence is arithmetic if the difference of two consecutive terms is the same for all two consecutive terms.
-Calculating the ratio:
For the first and second terms:
968/1452=2/3
For the second and third terms:
1936/3 ÷ 968 = 2/3
In conclussion, the sequence is geometric because the ratio is common.
The recursive formula of a geometric sequence is given by:
where an is the nth term, r is the common ratio and an-1 is the previous term.
In this case, r=2/3