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PSYCHO15rus [73]
3 years ago
11

Janet plants 20 varieties of flowers in the spring . She reports that 90% of the flowers she have planted bloomed

Mathematics
2 answers:
SIZIF [17.4K]3 years ago
8 0

Answer:

18

Step-by-step explanation:

90% of 20 is 18

Ronch [10]3 years ago
8 0

Answer:

18

Step-by-step explanation:

90%of 20 =18

so the answer is 18

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David bought a used car for $6,000 and later sold it for $4,000. What was the approximate percent decrease in the price of the c
Vanyuwa [196]

Answer:

percentage change= price change divided by original price x 100

Step-by-step explanation:

so answer = $2000 divided by $6000 x 100 = 33.3% decrease

7 0
3 years ago
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Solve x^2-8x+14=2x+7
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Answer:

Step-by-step explanation:

x²-8x+ 14 =2x+7

x² - 8x +14 - 2x - 7 = 0

x² - 10x  + 7 = 0

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3 years ago
An example of exponential growth is y=2(1/3)^x<br> True<br> False
Lemur [1.5K]

Answer:

False

Step-by-step explanation:

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3 years ago
The total monthly profit for a firm is P(x)=6400x−18x^2− (1/3)x^3−40000 dollars, where x is the number of units sold. A maximum
wlad13 [49]

Answer:

Maximum profits are earned when x = 64 that is when 64 units are sold.

Maximum Profit = P(64) = 2,08,490.666667$

Step-by-step explanation:

We are given the following information:P(x) = 6400x - 18x^2 - \frac{x^3}{3} - 40000, where P(x) is the profit function.

We will use double derivative test to find maximum profit.

Differentiating P(x) with respect to x and equating to zero, we get,

\displaystyle\frac{d(P(x))}{dx} = 6400 - 36x - x^2

Equating it to zero we get,

x^2 + 36x - 6400 = 0

We use the quadratic formula to find the values of x:

x = \displaystyle\frac{-b \pm \sqrt{b^2 - 4ac} }{2a}, where a, b and c are coefficients of x^2, x^1 , x^0 respectively.

Putting these value we get x = -100, 64

Now, again differentiating

\displaystyle\frac{d^2(P(x))}{dx^2} = -36 - 2x

At x = 64,  \displaystyle\frac{d^2(P(x))}{dx^2} < 0

Hence, maxima occurs at x = 64.

Therefore, maximum profits are earned when x = 64 that is when 64 units are sold.

Maximum Profit = P(64) = 2,08,490.666667$

6 0
3 years ago
Please help, i will give brainliest
Galina-37 [17]

Answer:

13. (E) all of the above 14. (E) the diagonals bisect the angles at the vertices

Step-by-step explanation:

3 0
3 years ago
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