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
torisob [31]
1 year ago
7

Math help questions ​

Mathematics
2 answers:
azamat1 year ago
6 0

Answer:

25 years

Step-by-step explanation:

total = before × percent ( in decimal ) × time

1400 = 800 × 0.07 × t

1400 = 56 × t

1400 ÷ 56 = 25

t = 25

<em>Hope this was helpful!</em>

Evgen [1.6K]1 year ago
4 0

After 1 year, the initial investment increases by 7%, i.e. multiplied by 1.07. So after 1 year the investment has a value of $800 × 1.07 = $856.

After another year, that amount increases again by 7% to $856 × 1.07 = $915.92.

And so on. After t years, the investment would have a value of \$800 \times 1.07^t.

We want the find the number of years n such that

\$856 \times 1.07^n = \$1400

Solve for n :

856 \times 1.07 ^n = 1400

1.07^n = \dfrac74

\log_{1.07}\left(1.07^n\right) = \log_{1.07}\left(\dfrac74\right)

n \log_{1.07}(1.07) = \log_{1.07} \left(\dfrac74\right)

n = \log_{1.07} \left(\dfrac74\right) = \dfrac{\ln\left(\frac74\right)}{\ln(1.04)} \approx \boxed{8.3}

You might be interested in
What is the square root of -9 in simplest form
matrenka [14]
It is 3i.
The square root of -9 is the square root of -1 times the square root of 9.
So: the square root of 9 is 3, and the square root of -1 is called i (this doesn't actually exist, it's just imaginary).
Then, the square root of -9 is 3i.
4 0
2 years ago
Read 2 more answers
solve the following quadratic equation by completing the square. if you need to round to the nearest tenth. x² - 20x = -75
lesantik [10]
The Answer should be either x=15 or x=5 I got both.
5 0
3 years ago
Which angles are complementary to
Molodets [167]
Complementary angles add up to 90°

∠BDC + ∠CDA = 90°

Answer: ∠BDC
8 0
3 years ago
Need help! What is the length of one side of the square?
scoray [572]

Answer:4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the volume of A right prism w/ a triangular base w/ sides of 3,4 and 5 w/ a height of 10?
azamat

Check the picture below.

\bf \textit{volume of a pyramid}\\\\ V=\cfrac{1}{3}Bh~~ \begin{cases} B=&area~of\\ &its~base\\ h=&height\\ \cline{1-2} B=&\frac{1}{2}(3)(4)\\ h=&10 \end{cases}\implies V=\cfrac{1}{3}\cdot \cfrac{1}{2}(3)(4)(10)\implies V=20

3 0
3 years ago
Other questions:
  • Given point L is the midpoint of Km if Kl =8x-5 and LM =6X+3 FIND KM
    5·1 answer
  • A regular polygon has 12 sides, each length 5, and apothem length 10. what is the area of the polygon? 600 450 300
    7·1 answer
  • Your school sold 456 tickets for a high school play. An adult ticket costs 4.00. A student ticket costs 2.00 total ticket sales
    15·2 answers
  • The formula for calculating commission is?
    10·2 answers
  • Together, Myra and her sister own 17 pairs of shoes. If Myra has 6 pairs, how many does her sistee have?
    5·2 answers
  • If ANYONE, anyone AT ALL can help me out with those last few questions it would help me out SO MUCH???
    13·1 answer
  • Simplify: 45x^6/9x^4 anyone?
    8·1 answer
  • 9x - 4= 2x + 3<br> -—-——-—-
    9·2 answers
  • Miguel ordered a rectangular print for his bedroom. The print is 78 ft wide and 135 ft long
    5·1 answer
  • The travel agent says the average high temperature at the resort is 25 degrees celsius. what is the equivalent fahrenheit temper
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!