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grin007 [14]
3 years ago
6

Devin wants to buy a new game system that costs $481.68 , including tax . He has already saved $225 for mowing lawns . Devin wil

l walk the neighbor's dog 4 months to save the remaining amount of money needed to purchase the game system . He will earn the same amount of money each month . How much money must Devin earn each month to save the exact remaining amount needed ?
A. $256.68

B. $120.42

C. $56.25

D. $64.17
Mathematics
2 answers:
Damm [24]3 years ago
7 0
The answer is $64.17
Vadim26 [7]3 years ago
5 0
D. Minus 225 from 481.65. Then divide that answer by 4 which equals 64.17
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4 years ago
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At a certain vineyard it is found that each grape vine produces about 10 lb of grapes in a season when about 700 vines are plant
Delicious77 [7]

Answer:

Number of vines that should be planted are 150.

Step-by-step explanation:

The number of pounds of pounds of grapes produced per acre is represented by the expression A_{n}=(700+n)(10-0.01n)

Where n = additional vines planted

To maximize the production of grapes we will find the derivative of A(n) and equate it to zero.

A_{n}=(7000+3n-0.01n^{2} )

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For A'_{n}=0

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n = \frac{3}{0.02}

n = 150

To check whether the maximum value of the function is at n = 150, we will find the second derivative A(n).

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Which shows A"(n) < 0

Therefore, A(n) has the maximum value at n = 150.

Therefore, number of vines that should be planted are 150.

5 0
4 years ago
What is a great answer for 5 plus negative 4
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3 years ago
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What is (1.2 x 10^-2) x (3 x 10^5)
liraira [26]

Answer:

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Step-by-step explanation:

(1.2 x 10^-2) x (3 x 10^5)

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3 years ago
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