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4 years ago

Find the exact circumference of a circle with diameter equal to 8 ft

2 answers:

lina2011 [118]4 years ago

6 0

The formula for circumference is C= 2(pi)(r)^2. Because diameter is double the radius, and the diameter is 8 ft, the radius is 4 ft. So, plug that into the equation, and you get: C=2(pi)(4)^2. The answer is 32 pi ft. If the question asks for the exact answer, keep the pi as it is, but if it says to round, multiply 32 by pi and round.

Nata [24]4 years ago

4 0

Answer:

Diameter = 8 ft

Circumference = πD

Circumference = 22/7 × 8 = 25.14 ft

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Kevin had to make 14 visits to the dentists last year to take care of his braces. Each visit cost #124. How much did the visits

VMariaS [17]

Answer:

Step-by-step explanation:

Let's look at simpler cases. If there was just one visit that would be 124. if there were two, each time he'd have to pay 124 so it's 124+124 = 248. So this is multiplication, because next would be three, which is 124+124+124 or 124 time 3.

In total then it's 124*14. You may usually use an x for multiplication, and if you do just keep in mind * can also be used. or, if something is inside of parenthesis like this 124(14) or (124)14. If you need help doing the multiplication let me know.

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3 years ago

Determine 57% of 289

krok68 [10]

Answer:

164.73

Step-by-step explanation:

1. convert 57% into a decimal by dividing it by 100.

--> 57/100 = 0.57

2. multiply the decimal by 289 to get your answer

--> 0.57(289) = 164.73

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3 years ago

What is the product of 8.2 x 10^2 and 3.4 x 10^5

Anuta_ua [19.1K]

Answer:

$278,800,000$ (Real Number) or $2.788 *10^8$ (Scientific Notation)

Concepts:

- Order of Operations

Parenthesis: ( )

Exponents: x²

Multiplication: ×

Division: ÷

Addition: +

Subtraction: -

Step-by-Step Solution:

$8.2*10^2*3.4*10^5$

Simplify exponents and square roots

$8.2*10^2*3.4*10^5$

$8.2*10^2*3.4*100000$

$8.2*100*3.4*100000$

$820*3.4*100000$

$2788*100000$

$278800000$

<h2>Answer:</h2>

278,800,000

Why learn this:

Order of operations is a basic rule of algebra. It tells us what to solve first when we have an equation with multiple functions, which is something that you will likely encounter throughout your math studies. The order is: Parentheses, Exponents, Multiplication and Division, then finally Addition and Subtraction. Remember that when you're solving within the parentheses, the Order of Operations applies!

Terms and topics

Order of operations

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3 years ago

How do i do this problem?

Dmitry_Shevchenko [17]

Answer:

D E

Step-by-step explanation:

If x = 0 the -0 + 4 would equal 4 which is the Y

and if x = 2 then -2 + 4 would equal 2

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3 years ago

Solve system of equations 14x + y = -4 and y = 3x^2 - 11x - 4

Keith_Richards [23]

Hello here is a solution :

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4 years ago