Answer:
5.5%
Step-by-step explanation:
To solve this problem we can use a modified version of the simple interest formula which is shown below:
![r=\frac{I}{Pt}](https://tex.z-dn.net/?f=r%3D%5Cfrac%7BI%7D%7BPt%7D)
<em>I = interest amount</em>
<em>P = principal amount</em>
<em>t = time (years)</em>
<em />
The first step is to find the interest gained from the investment.
![3,123.75-2,450=673.75](https://tex.z-dn.net/?f=3%2C123.75-2%2C450%3D673.75)
Next, plug in the values into the equation:
Multiply the bottom values
Divide the values
![r=.055](https://tex.z-dn.net/?f=r%3D.055)
The last step is to convert 0.055 into a percent:
![0.055(100)=5.5](https://tex.z-dn.net/?f=0.055%28100%29%3D5.5)
The interest rate is 5.5%
Answer:
$3.70
Step-by-step explanation:
$25.30 = 2P + 4D. p for popcorn and d for drinks
P= $5.25
$25.30 = 2($5.25) + 4D
$25.30 = $10.50 + 4D
-10.50. -10.50
inverse operations
$14.80 = 4D
÷4. ÷4
Inverse operations
$3.70 = D
It’s A I’m pretty sure it’s right
4+(−7) is 7 units from 4, in the negative direction (that is, to the left of 4)