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USPshnik [31]
3 years ago
7

An inlet pipe can fill an empty swimming pool in 7 hours, and another inlet pipe can fill a pool in 2 hours. How long will it ta

ke both pipes to fill the pool?
Mathematics
1 answer:
Naddika [18.5K]3 years ago
4 0
To do this, you have to make it like this: 



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Omar wants to open an account for his grandchildren that he hopes will have
olga_2 [115]

Using compound interest, it is found that he must deposit $56,389.

Compound interest:

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

  • A(t) is the amount of money after t years.  
  • P is the principal(the initial sum of money).  
  • r is the interest rate(as a decimal value).  
  • n is the number of times that interest is compounded per year.  
  • t is the time in years for which the money is invested or borrowed.

In this problem:

  • Hopes to have $80,000 in 20 years, thus t = 20, A(t) = 80000.
  • Interest rate of 1.75%, thus r = 0.0175.
  • Compounding monthly, thus n = 12
  • The investment is of P, for which we have to solve.

Then:

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

80000 = P(1 + \frac{0.0175}{12})^{12(20)}

P = \frac{80000}{(1 + \frac{0.0175}{12})^{12(20)}}

P = 56389

He must deposit $56,389.

A similar problem is given at brainly.com/question/25263233

4 0
2 years ago
I needddd helppppp. . . . . .
tankabanditka [31]

Answer:

F. 5:4

Step-by-step explanation:

Solve for a and c to find the ratio of a to c:

  • 2a = 3b
  • a = 3/2(b)
  • 6b = 5c
  • c = 6/5(b)

Now, we can use the value of a and c to find the ratio of a to c:

  • (3/2(b))/(6/5(b))
  • 3b/2 × 5/6b
  • 15b/12b
  • 5/4

F. 5:4 is the correct answer

8 0
3 years ago
Somebody confirm that I am not a complete moron please and thanks
Ann [662]

Answer:

B

Step-by-step explanation:

Triangle B because 128°>90°

3 0
2 years ago
Read 2 more answers
Can someone please tell me the answer of 2.394 • 7.489
Sveta_85 [38]

Answer: 17.928666

Step-by-step explanation:

6 0
2 years ago
(-1) power 50 is what
Tcecarenko [31]

(-1) to the power of an even number is +1.

(-1) to the power of an odd number is -1.

Since 50 is an even number, (-1)⁵⁰ = 1.

7 0
10 months ago
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