Which point on the number line shows the position of 8𝜋?

A B C D
<----|-------------|------------|-----------|-------------|------------|---------|----->
25 26 27 28

Hint: What number does 𝜋 equal? Multiply by 8 to see which point it is closest to.

O. A

O. B

O. C

O. D

5 answers

To find the position of \( 8\pi \) on the number line, we first need to know the approximate value of \( \pi \). The commonly used approximation is:

\[ \pi \approx 3.14 \]

Now, we can calculate \( 8\pi \):

\[ 8\pi \approx 8 \times 3.14 = 25.12 \]

Next, we can compare this value to the options given on the number line:

  • A: 25
  • B: 26
  • C: 27
  • D: 28

Since \( 25.12 \) is closest to \( 25 \), the point on the number line that shows the position of \( 8\pi \) is:

O. A

Which expression is equivalent to 2*2^6?

2^6

1/2^-7

2^7

2^5

To simplify the expression \( 2 \times 2^6 \), we can use the properties of exponents. Specifically, the property states that \( a^m \times a^n = a^{m+n} \).

In this case:

\[ 2 \times 2^6 = 2^1 \times 2^6 = 2^{1 + 6} = 2^7 \]

Thus, the expression \( 2 \times 2^6 \) is equivalent to \( 2^7 \).

The correct answer is:

2^7

Simplify. Express your answer using positive exponents.

10f^8 g^9*9f^4 g^9

To simplify the expression \(10f^8 g^9 \times 9f^4 g^9\), we will follow the rules of multiplication for coefficients and variables.

  1. Multiply the coefficients: \[ 10 \times 9 = 90 \]

  2. Combine the like terms for \(f\) using the property \(a^m \times a^n = a^{m+n}\): \[ f^8 \times f^4 = f^{8+4} = f^{12} \]

  3. Combine the like terms for \(g\): \[ g^9 \times g^9 = g^{9+9} = g^{18} \]

Now, putting it all together, we have:

\[ 90f^{12}g^{18} \]

Thus, the simplified expression is:

\[ \boxed{90f^{12}g^{18}} \]