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
Rus_ich [418]
2 years ago
8

If $4200 is invested in a savings account for which interest is compounded

Mathematics
2 answers:
Monica [59]2 years ago
7 0

Answer:

3.9%

Step-by-step explanation:

The formula for compound interest to apply is;

A=P(1+\frac{r}{n} )^{nt}

where;

A=amount at the end

P=starting amount/principal

n=number of compounding years

t=total number of years

r=interest rate expressed as a decimal

Given

P=$4200, n=2, t=4 and A=$4900 R=?

Substitute values in equation, take r=r

A=P(1+\frac{r}{n} )^{nt} \\\\\\4900=4200(1+\frac{r}{2} )^{2*4} \\\\\\4900=4200(1+0.5r)^8

Divide both sides by 4200

\frac{4900}{4200} =\frac{4200}{4200} (1+0.5r)^8\\\\\\1.1667=(1+0.5r)^8

Introduce root 8 to the left hand side, thus eliminating the power 8 in the right hand side

\sqrt[8]{1.1667} =1+0.5r\\\\\\1.0195=1+0.5r\\\\\\1.0195-1=0.5r\\\\\\0.0195=0.5r\\\\\\\frac{0.0195}{0.5} =\frac{0.5r}{0.5} \\\\\\0.039=r

r=3.9%

Lisa [10]2 years ago
3 0

Answer:

3.89

Step-by-step explanation:

Give a <3 ?

You might be interested in
Tracy needs to find the length and width of the equipment storage room where she works. The room is 2 meters longer than it is w
____ [38]

Answer:

3 meters

Step-by-step explanation:

We assume the storage room is a rectangle, like most rooms, no indication it is otherwise.

We know it's a rectangle and not a square because it is longer than wide.

We have the perimeter measurement (16 meters).

So, we can make the following equation:

2x + 2y = 16

x being the width of the room, y being it's length.  A perimeter is the sum of all sides.

We also know the room is 2 meters longer than wide... so:

y = x + 2

If we replace y in the first equation by its value relative to x, we get:

2x + 2(x + 2) = 16 which becomes

2x + 2x + 4 = 16

4x =12

thus x = 3

Width: 3 meters

Length: 5 meters.

Confirms the 16 meters perimeter.

5 0
3 years ago
Read 2 more answers
jake noted that the speech of light is approximately 1.1 x 10^9 kh/k the speed of sound is approximately 1.2 x 10^3 kh/k and 11/
Deffense [45]

Answer:

cdfJNMUCDJUNMCDJUUJNUJNHMKVSDFJNUMLSKLHUKJNHMC V

Step-by-step explanation:

hope that help

mark me brill

3 0
2 years ago
What is the perimeter of the triangle?<br>units=<br>​
Luba_88 [7]

Answer:

36

Step-by-step explanation:

Use pythagorean theorem

side 1 = 9

side 2 = 12

9^2 + 12^2 = third side ^2

third side = 15

9+12+15 = 36

Hope this helpful!!!!! :)

8 0
2 years ago
Write in scientific notation 57,000,000
oee [108]

Answer: 5.7 x 107

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Equation A y = 4/x + 3 Equation B y = −2x − 4 Which statement best compares the graphs of the two equations?
vampirchik [111]
Elimination
A, they are both linear
linear equations are sometimes given by y=mx+b, equation A, if graphed, produces a hyperbola which is not linear so statement A is false

B they areboth non-linear
equationb is linear so this is false

C equation a is non-linear and equation b is linear
true
C is the answer

4 0
3 years ago
Read 2 more answers
Other questions:
  • How can I solve this two step equation: 2(n+5)=-2
    12·2 answers
  • Are the graphs of the lines in the pair parallel? Explain. y = 4x – 4 24x – 4y = 96
    14·2 answers
  • A computer can be classified as either cutting dash edge or ancient. Suppose that 99​% of computers are classified as ancient.​(
    5·1 answer
  • Write and evaluate the definite integral that represents the volume of the solid formed by revolving the region about the x-axis
    9·1 answer
  • ASAP!! Please help me. I will not accept nonsense answers, but will mark as BRAINLIEST if you answer is correctly with solutions
    6·1 answer
  • The equation of the tangent plane to the ellipsoid x2/a2 + y2/b2 + z2/c2 = 1 at the point (x0, y0, z0) can be written as xx0 a2
    11·1 answer
  • Simplify -5(20 + 3).<br><br> 85<br> - 115<br> -97<br> -103
    7·1 answer
  • Find the side of the triangle. Round your result to two decimal places. Can someone help me with this one??
    11·1 answer
  • Which mathematical property does this equation model? 6×1=6
    9·1 answer
  • Quadrilateral ABCD lies in the standard (x,y) coordinate plane, with points A(-3,5), B(2,9), C(-1,-4), and D(1,-11). If the shap
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!