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SSSSS [86.1K]
2 years ago
9

3. Write an exponential equation for each coin that will give the coin's value, V, at any time, t. Use

Mathematics
1 answer:
Sloan [31]2 years ago
7 0

Answer:

Coin A : V(t)=25(1.07)^t

Coin B : V(t)=40(1.05)^t

Step-by-step explanation:

Consider the given formula is  

V(t)=P(1+r)^t

where, P is current value, V(t) is the value of the coin in t years, and r is annual appreciation rate.

For coin A, current value is 25 dollars and annual appreciation rate is 7%.

V(t)=25(1+0.07)^t

V(t)=25(1.07)^t

For coin B, current value is 40 dollars and annual appreciation rate is 5%.

V(t)=40(1+0.05)^t

V(t)=40(1.05)^t

Therefore, the required equations for coin A and B are V(t)=25(1.07)^t and V(t)=40(1.05)^t respectively.

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3 years ago
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Answer:

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Mr. Sanchez’s class sold fruit pies for $1.55 each and Mr. Kelly’s class sold bottles of fruit juice for $1.40 each. Together, t
Blababa [14]

Answer:

x + y = 60 and 1.55x + 1.4y = 88.20 and the solution is x = 32 and y = 28.

Mr. Sanchez’s class earned more money by $10.4.

Step-by-step explanation:

Mr. Sanchez’s class sold fruit pies for $1.55 each and Mr. Kelly’s class sold bottles of fruit juice for $1.40 each.

Let the number of sold fruit pies is x and bottles of fruit juice is y.

So, from the given condition we can write

x + y = 60 ........ (1)

⇒ 1.4x + 1.4y = 84 ....... (2) and

1.55x + 1.4y = 88.20 ........ (3)

Now, solving equations (2) and (3) we get (1.55 - 1.4)y = (88.2 - 84)

⇒ y = 28

And from equation (1) we get x = 60 - 28 = 32.

Therefore, Mr. Sanchez’s class earned more money. (Answer)

Now, this class have earned $(32 × 1.55 - 28 × 1.4) = $10.4 more. (Answer)

5 0
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If the wall with 4 ft. of storage area can fit 6 sections of plant and the wall with 7 ft. Can fit 5, that means each section is 3 ft. because 7-4=3, so that extra section on the wall with 4 ft. You do this because there is one extra section on the wall with four. Knowing this, the wall with 7 ft. Would be the 7 ft. + 5 sections of 3 ft. So 7+(5x3) = 22. On the wall with 4 ft., do the same,
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6 0
3 years ago
Marcel made an error when he used the distributive property to solve the problem shown. Which sentence describes the error? In S
nordsb [41]

The picture with the complete question is attached below :

Answer:

In Step 2, 90 should be multiplied by the quantity 10 – 12, not by 10

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3 0
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