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lutik1710 [3]
3 years ago
10

The value of is between 4.7 and 4.8. Which of the following is a more precise approximation of ?

Mathematics
1 answer:
Nataly_w [17]3 years ago
4 0

Answer: D. between 4.79 and 4.8

Step-by-step explanation:

The square root of 23 (√23) is 4.79583152331. We can obviously eliminate A and B. C and D is left. C is wrong because if we approximate the square root of 23, which is 4.79583152331, we get 4.79. 4.79 > 4.78, so it can't be C. Hope this helps :)

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A circle with center at (12,−1) passes through (0,−1). Find the circumference and area of the circle in terms of p.
madreJ [45]

Answer:

C = 75.36

A = 452.16

Step-by-step explanation:

Find the radius r by finding the distance between (12,-1) and (0,-1) using the distance formula.

d = \sqrt{(12-0)^2 + (-1--1)^2} =\sqrt{(12)^2 + (0^2} =\sqrt{144+0} =\sqrt{144}=12

The radius is 12.

So the circumference of the circle is C = 2\pi r = 2\pi 12 = 24\pi = 75.36

So the area of the circle is A = \pi r^2\\A = \pi 12^2\\A = 144\pi\\A = 452.16

6 0
3 years ago
What is 3.4 / x = 2.17/ 7.7?
adoni [48]
You could use a method called cross products to solve this proportional equation.  What you would do is multiply 3.4*7.7 =2.17*x

If multiplied correctly, your equation should be 26.18 = 2.17x

You are trying to get the variable alone on one side.  To do this, you have to undo the multiplication of the coefficient.  The opposite of multiplication is division, so you would divide both sides by 2.17.

If done correctly, your equation should now be x=<span>12.064516129

However, this can be rounded to x= approximately 12.066

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4 0
3 years ago
According to the complex conjugates theorem, if 5-i5 − i is a root of a function what else is a root?
Ad libitum [116K]

Answer:

5 + i

Step-by-step explanation:

The complex conjugates theorem states that if (a + ib) is a root of a polynomial equation then the complex conjugate (a - ib) will also be its root.

Now, in our case (5 - i) is a root of a polynomial.

The complex number (5 - i) has conjugate and it is (5 + i).

Therefore, (5 + i) will also be a root of the same polynomial. (Answer)

8 0
3 years ago
David drove 20 miles in 5 mins. Sean drove 45 miles in 9 mins. Who drove at a faster rate? Explain.
mars1129 [50]
Sean drove at a faster rate because if you divide each miles/minutes then it gives you how many miles per minute they drive. 20/5 is 4, and 45/9 is 5, and 5 is greater than 4.
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3 years ago
Find parametric equation of a line with a slope of -2 and passes through (-10,-20)
rosijanka [135]
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3 years ago
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