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Hitman42 [59]
3 years ago
7

1. An investor deposits $1000 in an account that promises an annual interest rate of 5%,

Mathematics
1 answer:
Virty [35]3 years ago
4 0

Answer:

$1,407.10

Step-by-step explanation:

1000(1.05)^7 = 1.05^7 ≈ 1.40710 * 1000 = $1,407.10

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The fuel efficiency (mpg rating) for cars has been increasing steadily since 1980. The formula for a car's fuel efficiency for a
Lisa [10]

Answer:

a) In the interval of [1980,1983].

b) In the interval of [1991, 1996].

Step-by-step explanation:

Fuel efficiency:

The fuel efficiency, for the cars, in x years after 1980, is given by:

E(x) = 0.36x + 15.9

15.9 is the fuel efficiency in 1980.

a. In what years was the average fuel efficiency for cars less than 17 mpg (in interval form)?

From 1980 to:

E(x) < 17

0.36x + 15.9 < 17

0.36x < 1.1

x < \frac{1.1}{0.36}

x < 3.06

3.06 = 1980 + 3 = 1983. So

In the interval of [1980,1983].

b. In what years was the average fuel efficiency for cars more than 20 mpg (in interval form)?

From x until 1996.

E(x) > 20

0.36x + 15.9 > 20

0.36x > 4.1

x > \frac{4.1}{0.36}

x > 11.38

11.38 = 1980 + 11 = 1991. So

In the interval of [1991, 1996].

4 0
2 years ago
Where do 2 lines intersect at
Nastasia [14]

Answer:

Point of intersection is the point where two lines or two curves meet each other. The point of intersection of two lines of two curves is a point.

Step-by-step explanation:

Hope it helps! =D

3 0
1 year ago
Read 2 more answers
How many lines of reflectional symmetry does an equilateral triangle have?
Mekhanik [1.2K]
There are 3 lines of reflectional symmetry in an equilateral triangle 
7 0
3 years ago
There are 18 girls in mr.brimleys class. If 60 percent of the students are girls how many students are in mr.brimley’s math clas
emmainna [20.7K]

Answer:

30 students in the class.

Step-by-step explanation:

There are several which in which we can approach this question:

We can do this question using direct proportion.

"If 18 girls represent 60%, how many students represent 100%?"

18

60

=

x

100

x

=

18

×

100

60

30

students altogether.

8 0
3 years ago
L
qwelly [4]

Answer:

  B, C, D, E

Step-by-step explanation:

The length of the third side will be between 12-7 = 5 and 12+7 = 19. The answer choices in that range are ...

  B. 17

  C. 7

  D. 9

  E. 11

__

Side lengths A(5) and F(3) are too short.

______

For more on the subject, see ...

  brainly.com/question/26258903

5 0
2 years ago
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