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If a^3 * b^2 = 64 and a = 2, what is the value of b? (2023)
If a^3 * b^2 = 64 and a = 2, what is the value of b? (2023)
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If a^3 * b^2 = 64 and a = 2, what is the value of b? (2023)
4
8
16
2
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Substituting a = 2, we have 2^3 * b^2 = 64, which simplifies to 8b^2 = 64. Thus, b^2 = 8, leading to b = 4.
Questions & Step-by-step Solutions
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Q: If a^3 * b^2 = 64 and a = 2, what is the value of b? (2023)
Solution:
Substituting a = 2, we have 2^3 * b^2 = 64, which simplifies to 8b^2 = 64. Thus, b^2 = 8, leading to b = 4.
Steps: 7
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Step 1: Start with the equation a^3 * b^2 = 64.
Step 2: Substitute the value of a, which is 2, into the equation. This gives us 2^3 * b^2 = 64.
Step 3: Calculate 2^3. This equals 8, so now we have 8 * b^2 = 64.
Step 4: To isolate b^2, divide both sides of the equation by 8. This gives us b^2 = 64 / 8.
Step 5: Calculate 64 / 8. This equals 8, so now we have b^2 = 8.
Step 6: To find b, take the square root of both sides. This gives us b = √8.
Step 7: Simplify √8. This can be written as 2√2, but for the purpose of this problem, we can also find the approximate value, which is about 2.83.
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