Kala call lasted for 0.36 minutes
<em><u>Solution:</u></em>
Given that Kala purchased a prepaid phone card for $15
Long distance calls cost $12 a minute using this card.
If the remaining credit on her card is $10.68
To find: Number of minutes her call lasted
Let "x" be the number of minutes her call lasted
Cost of 1 minute = $ 12
Total balance = $15
Remaining balance = $ 10.68
So we can frame a equation as:
Total balance = Remaining balance + Cost of 1 minute x number of minutes her call lasted

So her call lasted for 0.36 minutes
Answer:
Mean
Step-by-step explanation:
If Wanda has 80 baseball cards and Kyle has 110 baseball cards. Given that they know the total value of all their individual base ball cards, the worth of each baseball card will be derived by dividing the Total Worth of the cards by the number of cards. This is an example of Mean. Therefore they should use Mean to compare the worth of the cards.
Illustrative Example
If the Total Value of their cards are $500,
For Wanda, Value Per Card= $500/80 Cards =$6.25 per card
Similarly,
For Kyle, Value Per Card= $500/110 Cards =$4.55 per card
So we can see from this illustration whose card is with an higher price using the mean.
Answer:
40 ounces
Step-by-step explanation:
Number of ounces per day to be consumed = 4 oz
The number of days = 10
The smallest bag that has enough enough food for the cats is one which has atleast :
Number of ounces consumed per day * number of days
4 oz * 10 = 40 ounces
Answer:
<em>The average rate of change of Jack's investment from the third year to the fifth year is </em><em>$6.43</em>
Step-by-step explanation:
The function that defines the value of his investment after x years,

Putting the value of x as 3 and 5, we can get the value of his investment after 3 years and 5 years respectively.
So,


Then,




Answer:
Step-by-step explanation:
Here we have the curve xy =6 bounded by the line y=2, y=6 and x=6.
This region is rotated about x =6
We have to find the volume
Since rotated about vertical line parallel to y axis, shifting y axis to right by 6 units we get
the curve equation as
(6-x)y=6
6y-6xy =6
6xy =6(y-1)
x = (y-1)/y
and limits for y is 2 to y
Volume = 
Substitute limits
Volume = 