A cell phone plan costs $200 to start. Then there is a $50 charge each month
1 answer:
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Answer:
$835.71
Step-by-step explanation:
To solve this problem, we will use the compound interest formula:
<em>P = initial balance</em>
<em>r = interest rate (decimal)</em>
<em>n = number of times compounded annually</em>
<em>t = time</em>
First, lets change 4.75% into a decimal:
4.75% -> -> 0.0475
Now, plug the values into the equation:
Lastly, subtract <em>A </em>from the principal:
The interest earned is $835.71
Answer:
radius = 6.5
Step-by-step explanation:
The equation of a circle centred at the origin is
x² + y² = r² ( where r is the radius )
x² + y² = 42.25 ← is in this form
with r² = 42.25 ( take the square root of both sides )
r = = 6.5