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find the value of x. $10^x \\cdot 10^9 = 10^{11}$ 2. 16 is \\underline{…

Question

find the value of x.
$10^x \cdot 10^9 = 10^{11}$

  1. 16 is \underline{\hspace{0.5cm}} times larger than 4.
  2. write an equivalent expression for $6^2 \cdot 6^4$. show your steps.
  3. write the product of $3 \times 10^7$ and $4 \times 10^3$ in scientific notation.

bonus 1
what value of x makes the equation true?
$2^3 \cdot 2^x = 2^9$
bonus 2
how many times larger is $10 \times 10^4$ than $2 \times 10^{12}$?
bonus 3
write an equivalent expression for $3^{-7} \cdot 3^2$. show your steps.
bonus 4
select an equivalent expression for $(6^{-3})^2$. show your steps.

Explanation:

Problem 1: Find the value of \( x \) in \( 10^x \cdot 10^9 = 10^{11} \)

Step 1: Apply exponent product rule

When multiplying exponents with the same base, we add the exponents: \( a^m \cdot a^n = a^{m + n} \). So, \( 10^x \cdot 10^9 = 10^{x + 9} \).

Step 2: Solve for \( x \)

We have \( 10^{x + 9} = 10^{11} \). Since the bases are the same, the exponents must be equal: \( x + 9 = 11 \). Subtract 9 from both sides: \( x = 11 - 9 = 2 \).

Step 1: Set up division

To find how many times larger 16 is than 4, divide 16 by 4: \( \frac{16}{4} \).

Step 2: Calculate the result

\( \frac{16}{4} = 4 \).

Step 1: Apply exponent product rule

Using \( a^m \cdot a^n = a^{m + n} \), for \( 6^2 \cdot 6^4 \), add the exponents: \( 2 + 4 = 6 \).

Step 2: Write the equivalent expression

So, \( 6^2 \cdot 6^4 = 6^{2 + 4} = 6^6 \).

Answer:

\( x = 2 \)

Problem 2: 16 is __ times larger than 4