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son4ous [18]
2 years ago
14

The library at a certain university reported that journal prices had increased by 130% over a period of 10 years. The report con

cluded that this represented a price increase of 13% each year. If journal prices had indeed increased by 13% each year, what percentage increase would that give over 10 years? (Round your answer as a percentage to the nearest whole number.)
Mathematics
1 answer:
olchik [2.2K]2 years ago
5 0

Answer:

It would be a 1060% increase.

Step-by-step explanation:

You should start with a basic number such as 1 dollar. Then you should increase that 1 by 130% ten times. The result should be 10.604 dollars. This is a 1060% from 1 dollar. Hope this helps :)

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An object falls freely in a straight line and experiences air resistance proportional to its? speed; this means its acceleration
KiRa [710]

Answer:

t = 1.068 s

Step-by-step explanation:

given,

a(t) =- k v(t)

speed of the object decreases from 800 ft/s to 700 ft/s

distance = 1400 ft

time for deceleration = ?

a(t) =- k v(t)

\dfrac{dv}{dt}= - kv

\dfrac{dv}{v}= - kdt

integrating both side

\int_{800}^{700}\dfrac{dv}{v}= - k\int dt

ln(\dfrac{7}{8})=-kt

t = -\dfrac{1}{k}ln(\dfrac{7}{8})..........(1)

since,

v = v_1e^{-kt}

\dfrac{ds}{dt} = 800e^{-kt}

\int ds= 800\int_0^t e^{-kt}dt

1400= -\dfrac{800}{k}[e^{-kt}-e^0]

from equation 1

k= -\dfrac{8}{14}[\dfrac{7}{8}-1]

k= \dfrac{1}{8}

putting value of k in equation (1)

t = -8ln(\dfrac{7}{8})

t = 1.068 s

5 0
3 years ago
The function below crosses the x-axis once. y=3x^2-8x+8
Mekhanik [1.2K]
I believe it is false because it only passes through the y-axis not the x-axis.

6 0
2 years ago
A flower surrounds the base of a tree. It is in close by stones to form a circle that measures 21.98 feet around. What is the ra
Bumek [7]

(3.14)(21.98)(21.98)

-------------------------------

2

4 0
3 years ago
The radius of a circle is 58 centimeters. enter the circumference of the circle
Zanzabum

Answer:

C = 364.24

Step-by-step explanation:

Comment

The circumference and the radius are related to one another. The constant relating them is pi which is a fixed number of 3.14 The formula for the circumference is C = 2*pi * r

Givens

pi = 3.14

r = 58 cm

Circumference = ?

Formula

C = 2*pi * r

C = 2 * 3.14 * 58

C = 364.24

5 0
2 years ago
Need help on this question too hard :((​
andrew-mc [135]

Answer:

2/3

Step-by-step explanation:

Convert the fractions to decimals.

2/3 = 0.666

4/5 = 0.8

14/18 = 0.777

34/50 = 0.68

From the decimals, 0.666 is the only option which falls between 0.5 and 0.75.

5 0
3 years ago
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