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yawa3891 [41]
4 years ago
12

Nine is 12% of which number

Mathematics
1 answer:
Ksenya-84 [330]4 years ago
8 0
The answer is 75. You can find this using the equation 9 = 0.12x and then dividing 9 by 0.12 or 12%.
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Sung Lee invests $4,000 at age 18. He hopes the investment will be worth $16,000 when he turns 25. If the interest compounds con
irinina [24]

Answer:

The growth rate he needs to achieve his goal is approximatelly 19.8%

Step-by-step explanation:

Since the sum will be compounded continuously we have to use the appropriate formula given below:

M = C*e^(r*t)

Where "M" is the final amount, C is the initial amount, r is the interest rate and t is the time elapsed. Since Sung Lee will invest that sum at 18 years old and he wants to recieve the return at 25, then the time elapsed is given by 25 -18 = 7 years. We can now apply the data to the formula:

16000 = 4000*e^(r*7)

4000*e^(7*r) = 16000

e^(7*r) = 16000/4000 = 4

ln[e^(7*r)] = ln(4)

7*r = ln(4)

r = ln(4)/7 = 0.198

The rate of interest is given by (r)*100%, so we have (0.198)*100% = 19.8%.

4 0
3 years ago
Help me please <br> Najdjajabahvaud
professor190 [17]

Answer:

$27

Step-by-step explanation:

Before entering, you have already payed, thus at 0 rides, your money payed is 27.

8 0
3 years ago
Read 2 more answers
An insurance company sets up a statistical test with a null hypothesis that the average time for processing a claim is 7 days, a
JulsSmile [24]

Answer:

There was no error

Step-by-step explanation:

There are two types of statistical errors, the type 1 error and the type 2 error. In this case we refute the null hypothesis when the hypothesis is, in fact, false, because the mean process is 9 days instead of 7. Therefore we made no errors.

If the null hypothesis were True, a type 1 error would have ocurred. If the null hypothesis were false and we didnt refute it, then a type 2 error would have ocurred.

4 0
3 years ago
Gabriella and Ming are selling cookie dough for a school fundraiser. Customers can buy packages of white chocolate chip cookie d
soldier1979 [14.2K]

9514 1404 393

Answer:

  • white chocolate chip: $17
  • gingerbread: $19

Step-by-step explanation:

We can let x and y represent the costs of packages of white chocolate chip and gingerbread cookie dough, respectively. Then the two sales can be represented by ...

  11x +2y = 225

  8x +10y = 326

__

There are several ways a system of equations like this can be solved. One of my favorites is to use a graphing calculator (see attached).

We can also use substitution. We see that the coefficients of y are simply related, so we can use ...

  2y = 225 -11x . . . . from equation 1

  8x +5(2y) = 326 . . . rearrange equation 2

  8x +5(225 -11x) = 326 . . . . substitute for 2y

  -47x +1125 = 326 . . . . simplify

  799 = 47x . . . . . . . add 47x-326

  17 = x . . . . . . . . . . . divide by 47

  2y = 225 -11(17) = 38

  y = 19 . . . . . . divide by 2

The package costs are ...

  white chocolate chip dough: $17

  gingerbread dough: $19.

6 0
3 years ago
Which of these are mathematical sentences? Check all that apply.
seraphim [82]

Answer:

A, D

Step-by-step explanation:

A is a completed statement and b can be solved.

B is an incomplete statement.

C is just a number.

D is a completed statement and y can be solved.

4 0
4 years ago
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