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Anvisha [2.4K]
3 years ago
8

You are saving for a bicycle that costs $120. You Deposit $75 in an account that earns compounded annually. The Expression 75(1+

r)^2 represents the balance after 2 years the annual interest rate in decimal form.
A. Write a polynomial that represents the balance of your account.
B. What is the balance of your account when the interest rate is 10%.
C. How much more money do you need to buy the bicycle?
Mathematics
1 answer:
dezoksy [38]3 years ago
8 0
A. Expanding the given expression, you have
  balance = 75r^2 +150r +75

B. For r=0.10, the balance after 2 years is 75*1.1^2 = 90.75

C. The difference between $120 and 90.75 is $29.25. You need $29.25 more to buy the bicycle.
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alex41 [277]

Answer:

cos α = 8/17

Apply Pythagoras theorem for triangle ,

Let get unknown side of triangle is y

17^2 = 8^2 + y^2

17^2 - 8^2 =  y^2

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y = sqrt(225)

y = 15

tan α = 15/8

Step-by-step explanation:

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1+4=5 2+5=7 3x6=18 8+11=19
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stepladder [879]
E) 2 
 Remember that the first derivative of a function is the slope of the function at any specified point. We've been told that f(0) = -5 and that f'(x) is always less than or equal to 3. So let's look at the available options and see what the average slope would have to be in order to get the specified value of f(2).
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 Now taking into consideration the mean value theorem, the value of the function f'(x) has to have the value equal to the average slope between the two points at at least one point between the two given values. For options A, B, C, and D it's possible for f'(x) to return values that make that slope possible. However, for option E, the mean value theorem indicates that f'(x) has to have the value of 3.5 for at least 1 point between x=0 and x=2. And since we've been told that f'(x) is less than or equal to 3 for all possible values of x, that is in conflict and f(2) can not have the value of 2.
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3 years ago
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Alona [7]

Answer:

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Hope i helped :)

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Answer:

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Step-by-step explanation:

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