Answer:
1 A= pi 21^2
2 C=pi 21
3 A= pi 10.5^2
4 C= 2pi 10.5
Step-by-step explanation:
The balance was $4400.25 before 4 years.
<h3>What is an Equation?</h3>
An equation is a mathematical statement formed when two expressions are equated using an equal sign.
The equations are useful in the determination of unknown parameters.
The equations are of various types, such as Trigonometric equations, and quadratic equations.
The balance of an investment account is $308.32
Let the balance 4 years ago was $x
Then the balance today is represented by x + 308.32
The current balance is $4708.57
The expressions can be equated to get the value of the balance 4 years ago.
x + 308.32 = 4708.57
x = 4708.57 - 308.32
x = $4400.25
The balance 4 years ago was $4400.25
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Answer:
2025 yd²
Step-by-step explanation:
(Ratio of sides)² = Ratio of areas
(2/9)² = 4/81
Ratio of Surface areas:
4 in² represents 81 yd²
4/81 = 100/SA
SA = 100 × 81/4
SA = 2025
Answer:
11 hours and 15 minutes
Step-by-step explanation:because 15 times 4 is 60 so 1/4 of 60 is 15