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loris [4]
4 years ago
7

Help plz dont know the answer

Mathematics
1 answer:
stealth61 [152]4 years ago
6 0

Answer is B

How I got is because I had to first figure out what 40 seconds worth of heartbeats are equal to. 80 - 48 is 32 divided by 2 is 16. Next, I added 48 and 16 which got me 64. All I had to do next was to add 80 and 16 because the rate of heartbeats per 10 seconds is 16. 80+16=96 and thats how I figured that the answer is B

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Como se hace y la respuesta
allochka39001 [22]

The arc length is 0.785 units and the diagonal  is √2 units

<h3>How to determine the lengths?</h3>

The question requires that we determine the lengths of the blue line and the arc

The blue line is the diagonal of the square, whose side length (l) is

l = 1

The diagonal is then calculated as:

d = l * \sqrt 2

This gives

d = 1 * \sqrt 2

d = \sqrt 2

The diagonal divides the vertex of the square into 45 degrees a piece, and the diagonal represents the radius of the arc

This means that:

r = \sqrt 2

\theta = 45^o

The arc length is:

l = \frac{\theta}{360} * \pi r^2

So, we have:

l = \frac{45^o}{360} * 3.14 * \sqrt 2^2

This gives

l = \frac{282.6}{360}

Divide

l = 0.785

Hence, the arc length is 0.785 units and the diagonal  is √2 units

Read more about arc lengths at:

brainly.com/question/2005046

#SPJ1

5 0
2 years ago
The only animals on farmer Justin's farm are cows and chickens. If justin counts a total of 45 heads and a total of 126 feet. Fi
IRINA_888 [86]

Answer:

The number of cows on Justin's farm is <u>18</u>.

Step-by-step explanation:

Given:

The only animals on farmer Justin's farm are cows and chickens.  

Justin counts a total of 45 heads and a total of 126 feet.

Now, to find the number of cows on Justin's farm.

Let the number of cows be x.

And the number of chickens be y.

So, the total number of heads are:

x+y=45

y=45-x  ......(1)

As, the feet of chicken are 2 and the cows are 4.

Thus, total number of feet are:

4x+2y=126

Substituting the value of y from equation (1) we get:

4x+2(45-x)=126

4x+90-2x=126

90+2x=126

<em>Subtracting both sides by 90 we get:</em>

2x=36

<em>Dividing both sides by 2 we get:</em>

x=18.

<em>The number of cows = 18.</em>

Therefore, the number of cows on Justin's farm is 18.

3 0
3 years ago
Read 2 more answers
How many lb are 16 ounces
polet [3.4K]
1 ounce is equal to 0.0625 pounds.

16 * 0.0625 = 1

So there is 1 lb in 16 ounces.
5 0
3 years ago
Read 2 more answers
Your family ate at a diner and left a 15% tip that was<br><br> $7.35. How much was the bill?
Westkost [7]

Answer: $49 w/o tip

Step-by-step explanation:

15% of the total = 7.35

10% of the total = 2/3 of 7.35

10% of the total = 4.9

100% of the total = 49

THE BILL WAS $49, AND WITH THE TIP $56.35

3 0
3 years ago
Read 2 more answers
Please help!!!!
stiv31 [10]

Rachel gets the better deal because:

5.40/12=.45 per ounce

Michael: 7.52/16=.47 per ounce


6 0
4 years ago
Read 2 more answers
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