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maw [93]
4 years ago
11

Using the calculator, what is the approximate radius of a circle whose circumference is 62.8 inches?

Mathematics
1 answer:
alexandr1967 [171]4 years ago
6 0

Answer:

Solve for radius

radius = 10

Step-by-step explanation:

so to find the radius the formula is the circumference ÷ 2 × pie which is 3.14

so what i did was 62.8 ÷ (2 × 3.14) = 10

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Graph f(x) = x2 + 2x - 3, label the function’s x-intercepts, y-intercept and vertex with their coordinates. Also draw in and lab
Semenov [28]
<h2>Answer with explanation:</h2>

The given function : f(x)=x^2+2x-3

Using completing the squares, we have

f(x)=x^2+2x+1-1-3        [∵ (x+1)^2=x^2+2x+1]

f(x)=(x+1)^2-4      (1)

Comparing (1) to the standard vertex form f(x)=(x-h)^2+k , the vertex of function is at (h,k)=(-1,-4)

For x-intercept, put f(x)=0 in (1), we get

0=(x+1)^2-4\\\\\Rightarrow\ (x+1)^2=4    

Square root on both sides, we get

x+1=\pm2\\\\x+1=-2\ or\ \ x+1=2\\\\=x=-3\ \ or\ x=1

∴ x intercepts : x= (-3,0) and (1,0)

For y-intercept put x=0 in (1), we get

f(1)=(1)^2-4=1-4=-3  

∴ y intercept : (0,-3)

Axis of symmetry : \dfrac{-b}{2a}

In f(x)=x^2+2x-3 , a=1 and b=2

Axis of symmetry=\dfrac{-2}{2(1)}=-1

5 0
4 years ago
As an estimation we are told 5 miles is 8 km. <br> Convert 70 miles to km. <br> km
Lena [83]

Answer:  112 km

=====================================================

Work Shown:

(5 miles)/(8 km) = (70 miles)/(x km)

5/8 = 70/x

5*x = 8*70 ... cross multiply

5x = 560

x = 560/5 .... divide both sides by 5

x = 112

According to the given estimation, 70 miles converts to 112 km.

The more accurate conversion is approximately 70 miles = 112.65408 km, so this estimation isn't too far off.

8 0
4 years ago
if the ratio of red roses to yellow roses is 4 to 6 and there are a total of 50 roses how many of them are yellow
balandron [24]
Ratio of red roses to yellow roses as given in the question = 4:6
Total number of roses in the question = 50
Let us assume that the common ratio is = x
Then
4x + 5x = 50
10x = 50
x = 50/10
   = 5
Then
The number of yellow roses = 6 * 5
                                              = 30
So there are 30 yellow roses among the total of 50 roses. I hope the procedure is simple enough for you to understand. You can use this procedure for solving similar type of problems in future. I hope this has helped you.
7 0
3 years ago
25736÷7654= help me please
bearhunter [10]

3.36242487588 is the answer


8 0
3 years ago
Read 2 more answers
To protect them selfs from extreme hot or cold temperatures ,Americans Alligators dig burrows in the mud.suppose there are 20 al
Alexxandr [17]
1,000 feet of barrrows, 50x20=1k
4 0
3 years ago
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