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Irina18 [472]
3 years ago
12

The radius of a circle is 4 yards. What is the circle’s circumference?

Mathematics
1 answer:
8_murik_8 [283]3 years ago
5 0

Answer:

25.13

Step-by-step explanation:

The formula of a circumference of a circle is C= 2x π x r

c = 2x π  x 4 yards

c= 25.13 yards

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Complete the equation for the standard form of the line that has an x-intercept of -5 and a y-intercept of -4.
Verdich [7]

Answer:

Intercept form     \frac{x}{-5} + \frac{y}{-4} = 1

The standard form of the equation of the line

   4 x + 5 y +20 =0

Step-by-step explanation:

<u><em>Explanation</em></u>

Given that x-intercept (a) = -5

and y-intercept (b) = -4

Intercept form

                 \frac{x}{a} + \frac{y}{b} = 1

                \frac{x}{-5} + \frac{y}{-4} = 1

          ⇒   \frac{4x+5y}{-20}  = 1

                4 x + 5 y = -20

<u><em>Final answer:-</em></u>

The standard form of the equation of the line

               4 x + 5 y +20 =0

7 0
3 years ago
Use mathematical induction to show that 4^n ≡ 3n+1 (mod 9) for all n equal to or greater than 0
cestrela7 [59]
When n=0, you have

4^0=1\equiv3(0)+1=1\mod9

Now assume this is true for n=k, i.e.

4^k\equiv3k+1\mod9

and under this hypothesis show that it's also true for n=k+1. You have

4^k\equiv3k+1\mod9
4\equiv4\mod9
\implies 4\times4^k\equiv4(3k+1)\mod9
\implies 4^{k+1}\equiv12k+4\mod9

In other words, there exists M such that

4^{k+1}=9M+12k+4

Rewriting, you have

4^{k+1}=9M+9k+3k+4
4^{k+1}=9(M+k)+3k+3+1
4^{k+1}=9(M+k)+3(k+1)+1

and this is equivalent to 3(k+1)+1 modulo 9, as desired.

3 0
3 years ago
5(x-6)+2=7x-10 using the distributive property
Lady_Fox [76]

x equals negative 9 i think


4 0
3 years ago
Read 2 more answers
After years of overhunting, environmental scientists have reintroduced mountain goats into Yellowstone National Park. The initia
Tatiana [17]

We want to see how much the population of goats grows each year. We will see that the correct option is c: 17%.

<h3>Exponential growth of populations</h3>

We know that:

  • The initial number of goats is 1,500.
  • After 11 years, the population is 8,400.

The population can be modeled with an exponential equation as:

P(t) = A*(1 + r)^t

Where:

  • A is the initial population.
  • r is what we want to find, it depends on how much the population increases.
  • t is the time in years.

So we have:

P(t) = 1500*(1 + r)^t

And we know that after 11 years the population is 8,400, so we have:

P(11) = 1500*(1 + r)^11 = 8400

Now we can solve this for r:

(1 + r)^11 = 8400/1500 = 5.6

(1 + r) = (5.6)^(1/11) = 1.17

r = 1.17 - 1 = 0.17

r = 0.17

To get it in percentage form, you just need to multiply it by 100%

0.17*100% = 17%

This means that the population increases a 17% each year, so the correct option is c.

If you want to learn more about exponential growth, you can read:

brainly.com/question/13223520

7 0
2 years ago
What is 8 to the power of 4?
Dafna11 [192]

Answer:

4096

Step-by-step explanation:

6 0
3 years ago
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