1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
marta [7]
2 years ago
10

If a sum invested gains 10% each year how long will it be before it has doubled its value?

Mathematics
1 answer:
Anika [276]2 years ago
4 0

Using an exponential equation, it is found that it will be 7.3 years before the value is doubled.

The equation for an increasing <u>exponential function</u> is given by:

A(t) = A(0)(1 + r)^t

In which:

  • A(0) is the initial amount.
  • r is the growth rate, as a decimal.

In this problem:

  • Gains 10% each year, thus r = 0.1.

The doubling time is t for which A(t) = 2A(0), then:

A(t) = A(0)(1.1)^t

2A(0) = A(0)(1.1)^t

(1.1)^t = 2

\log{(1.1)^t} = \log{2}

t\log{1.1} = \log{2}

t = \frac{\log{2}}{\log{1.1}}

t = 7.3

It will be 7.3 years before the value is doubled.

A similar problem is given at brainly.com/question/23008760

You might be interested in
Can i be happy? <br> Can i be a person is perfect?
elixir [45]

Answer:

yes, no

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What’s the answer ????
Citrus2011 [14]

Answer:

C. The graph would shift 5 units to the left

Step-by-step explanation:

If (x+5) was substituted in the place of x then it would shift 5 units to the left

Answer is C.

7 0
3 years ago
Read 2 more answers
The plsyground at a park is shaped like a trapezoid the dimensions of the playground are shiwn in the diagram
Firlakuza [10]
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
3 0
3 years ago
A tiger ate food that weighed 15% of its body weight. If it ate 75lb., how much does the tiger weigh?
Andru [333]
11.25 lbs, if I calculated this correctly.
6 0
3 years ago
Read 2 more answers
Emily and her children went into a grocery store and she bought $20.80 worth of bananas and peaches. Each banana costs $0.80 and
MakcuM [25]

Answer:

The number of bananas that Emily bought was 6 and the number of peaches that Emily bought was 8

Step-by-step explanation:

<u><em>The complete question is</em></u>

Emily and her children went into a grocery store and she bought $20.80 worth of bananas and peaches. Each banana costs $0.80 and each peach costs $2. She bought  a total of 14 peaches and bananas altogether. Determine the number of peaches and the  number of bananas that Emily bought

Let

x ----> the number of bananas that Emily bought

y ----> the number of peaches that Emily bought

we know that

She bought  a total of 14 bananas and peaches altogether

so

x+y=14 -----> equation A

She bought $20.80 worth of bananas and peaches

so

0.80x+2y=20.80 -----> equation B

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

The solution is the point (6,8)

see the attached figure

therefore

The number of bananas that Emily bought was 6 and the number of peaches that Emily bought was 8

3 0
3 years ago
Other questions:
  • A cone has a diameter of 30 in. and a slant height of 17 in.
    9·1 answer
  • Evaluate the expression when c= -4.<br> c² – 5c+2
    14·1 answer
  • A real estate agent and $6300 commission on the property sale of $210,000 what is her rate of commission
    6·1 answer
  • What is 1000x - 1x?<br><br> A) 101x<br> B) 1001x<br> C) 99x<br> D) 999x
    9·2 answers
  • Two boats start their journey from the same point A and travel along directions AC and AD, as shown below: ABC is a right triang
    10·2 answers
  • Do two triangles with the same base and height have the same area
    15·1 answer
  • The volume of a pyramid is 47m3. The height of the pyramid is 6 meters. What is the area of its base?
    13·2 answers
  • Please help<br><br> Find the inverse function.<br> 8x – 4y = 24
    8·1 answer
  • Pls help Will give u brainliest
    11·1 answer
  • Item 6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!