Earnings Reynalda works as a salesperson in the electronics division of a department store. She earns a base weekly salary plus a commission based on the retail price of the goods she has sold. If she sells x dollars’ worth of goods in a week, her earnings for that week are given by the function E ( x ) = 400 + 0.03 x (a) Find E ( 2000 ) and E ( 15 , 000 ) . (b) What do your answers in part (a) represent? (c) Find E ( 0 ) . What does this number represent? (d) Find the net change and the average rate of change of her earnings E between x = 2000 and x = 15 , 000 . (e) From the formula for E, determine what percentage Reynalda earns on the goods that she sells.
Earnings Reynalda works as a salesperson in the electronics division of a department store. She earns a base weekly salary plus a commission based on the retail price of the goods she has sold. If she sells x dollars’ worth of goods in a week, her earnings for that week are given by the function E ( x ) = 400 + 0.03 x (a) Find E ( 2000 ) and E ( 15 , 000 ) . (b) What do your answers in part (a) represent? (c) Find E ( 0 ) . What does this number represent? (d) Find the net change and the average rate of change of her earnings E between x = 2000 and x = 15 , 000 . (e) From the formula for E, determine what percentage Reynalda earns on the goods that she sells.
Solution Summary: The author explains the function E(x)=400+0.03x, where x represents the number of copies printed.
Earnings Reynalda works as a salesperson in the electronics division of a department store. She earns a base weekly salary plus a commission based on the retail price of the goods she has sold. If she sells
x
dollars’ worth of goods in a week, her earnings for that week are given by the function
E
(
x
)
=
400
+
0.03
x
(a) Find
E
(
2000
)
and
E
(
15
,
000
)
. (b) What do your answers in part (a) represent? (c) Find
E
(
0
)
. What does this number represent? (d) Find the net change and the average rate of change of her earnings E between
x
=
2000
and
x
=
15
,
000
. (e) From the formula for E, determine what percentage Reynalda earns on the goods that she sells.
For each graph below, state whether it represents a function.
Graph 1
24y
Graph 2
Graph 3
4
2
-8
-6 -4
-2
-2
2 4 6
Function?
○ Yes
○ No
○ Yes
○ No
Graph 4
Graph 5
8
Function?
Yes
No
Yes
No
-2.
○ Yes
○ No
Graph 6
4
+
2
4
-8 -6 -4 -2
2 4 6
8
Yes
-4++
No
Practice
k Help
ises
A
96
Anewer The probability that you get a sum of at least 10 is
Determine the number of ways that the specified event can occur when
two number cubes are rolled.
1. Getting a sum of 9 or 10
3. Getting a sum less than 5
2. Getting a sum of 6 or 7
4. Getting a sum that is odd
Tell whether you would use the addition principle or the multiplication
principle to determine the total number of possible outcomes for the
situation described.
5. Rolling three number cubes
6. Getting a sum of 10 or 12 after rolling three number cubes
A set of playing cards contains four groups of cards designated by color
(black, red, yellow, and green) with cards numbered from 1 to 14 in each
group. Determine the number of ways that the specified event can occur
when a card is drawn from the set.
7. Drawing a 13 or 14
9. Drawing a number less than 4
8. Drawing a yellow or green card
10. Drawing a black, red, or green car
The spinner is divided into equal parts.
Find the specified…
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