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Paul [167]
3 years ago
9

You are considering two cars that you plan on keeping for 5 years. One has an EPA combined city and highway rating of 33 mpg. Th

e second has an EPA rating of 36 mpg. Suppose gasoline costs $3.41 per gallon and you drive 10,000 miles each year.
(a) How much (in dollars) will you save in 1 year by purchasing the 36 mpg car? (Enter a number. Round your answer to the nearest cent.)

(b) If you deposit that amount at the end of each year for the 5 years of ownership into an account that earns 4.1% compounded annually, how much (in dollars) will you save over 5 years? (Enter a number. Round your answer to the nearest cent.)
Mathematics
1 answer:
amid [387]3 years ago
6 0

Answer:

a) $86.11

b) $467.33

Step-by-step explanation:

no. of gallons saved 'n' per year

n = (10000/33) - (10000/36)

n = 2500/99

Amount saved = 3.41×n = 3.41×2500/99

= $86.11

b) over 5 years:

86.11( 1 + (1.041) + (1.041)² + (1.041)³ + (1.041)⁴ )

= 86.11(5.427157431)

= $467.33

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Three friends went apple picking and then counted the apples they picked.
Marizza181 [45]

Answer:

Carmen has the biggest red to green apple ratio

Step-by-step explanation:

Red to green apple ratios are, in order, 20:12, (5:3), 12:10 (6:5), and 16:20 (4:5). 5:3 is the biggest red to green apple ratio because for every 5 red apples Carmen has 3 green apples.

7 0
2 years ago
Do number 7 and 8 please
Kruka [31]

7) \sqrt[3]{64} = \sqrt[3]{4^3} = 4

8) \sqrt[3]{216} = \sqrt[3]{6^3} = 6

5 0
3 years ago
Avery can run at 10 uph. The bank of a river is represented by the line 4x + 3y = 12, and Avery is at (7, 5). How much time does
Reil [10]
The minimum distance will be along a perpendicular line to the river that passes through the point (7,5)

4x+3y=12

3y=-4x+12

y=-4x/3+12/3

So a line perpendicular to the bank will be:

y=3x/4+b, and we need it to pass through (7,5) so

5=3(7)/4+b

5=21/4+b

20/4-21/4=b

-1/4=b so the perpendicular line is:

y=3x/4-1/4

So now we want to know the point where this perpendicular line meets with the river bank.  When it does y=y so we can say:

(3x-1)/4=(-4x+12)/3  cross multiply

3(3x-1)=4(-4x+12)

9x-3=-16x+48

25x=51

x=51/25

x=2.04

y=(3x-1)/4

y=(3*2.04-1)/4

y=1.28

So now that we know the point on the river that is closest to Avery we can calculate his distance from that point...

d^2=(x2-x1)^2+(y2-y1)^2

d^2=(7-2.04)^2+(5-1.28)^2

d^2=38.44

d=√38.44

d=6.2 units

Since he can run at 10 uph...

t=d/v

t=6.2/10

t=0.62 hours  (37 min 12 sec)

So it will take him 0.62 hours or 37 minutes and 12 seconds for him to reach the river.




8 0
3 years ago
A shuttle launch depends on three key devices that may fail independently of each other with probabilities 0.01, 0.02, and 0.02,
worty [1.4K]

Answer:

0.950796

Step-by-step explanation:

Given that a shuttle launch depends on three key devices that may fail independently of each other with probabilities 0.01, 0.02, and 0.02, respectively.

Required probability =  the probability for the shuttle to be launched on time

= Probability that all three do not fail

Since each key device is independent of the other

we have

prob that all three do not fail = (1-0.01)(1-0.02)(1-0.02)\\=0.99*0.98*0.98\\=0.950796

6 0
3 years ago
A one year membership to a gym Costa $725 the registration fee is $125 and the remaining amount la paid monthly define a variabl
konstantin123 [22]

Heyo. Let's go ahead and set this problem up

It should look like this

12x + 125 = 725

The variables can be another letter, doesn't matter.

12 will stand for the months in a year

x is the amount paid per month

125 is the registration free

725 is the one year membership total


Subtract both sides by 125 to get:

12x = 600

Divide both sides by 12 to get:

x=50

That being said, each month, a new member will pay $50.

3 0
3 years ago
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