Rina- being weak in Math asked for Tina-s help in preparing for exams- Tina started by saying- - 32- 32-34 - Then she asked Rina to find the value of - 53- 54 - Rina replied 512 as the answer- Did she answer it correctly- Yes-No

The correct option is B No We know that a^m × a^n = a^m+n (a is a non zero integer) Using this law, we get 5^3 × 5^4 = 5^3+4 = 5^7 So, Tina’s answer is wrong. ...

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Byju's Answer

Standard VII

Mathematics

a^m x b^m = (ab)^m

Rina, being w...

Question

Rina, being weak in Math asked for Tina’s help in preparing for exams.

Tina started by saying, $“ 3^{2} \times 3^{2} = 3^{4} ”$

Then she asked Rina to find the value of $“ 5^{3} \times 5^{4} ”$ . Rina replied $5^{12}$ as the answer. Did she answer it correctly? (Yes/No)

Yes

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Solution

The correct option is B
No

We know that $a^{m} \times a^{n} = a^{m + n}$ (a is a non-zero integer)

Using this law, we get $5^{3} \times 5^{4} = 5^{3 + 4} = 5^{7}$

So, Tina’s answer is wrong.

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Rina, being weak in Math asked for Tina’s help in preparing for exams. Tina started by saying, “32×32=34” Then she asked Rina to find the value of “53×54” . Rina replied 512 as the answer. Did she answer it correctly? (Yes/No)

The correct option is B No We know that am×an=am+n (a is a non-zero integer) Using this law, we get 53×54=53+4=57 So, Tina’s answer is wrong.

Rina, being weak in Math asked for Tina’s help in preparing for exams.

Tina started by saying, $“ 3^{2} \times 3^{2} = 3^{4} ”$

Then she asked Rina to find the value of $“ 5^{3} \times 5^{4} ”$ . Rina replied $5^{12}$ as the answer. Did she answer it correctly? (Yes/No)

The correct option is B
No

We know that $a^{m} \times a^{n} = a^{m + n}$ (a is a non-zero integer)

Using this law, we get $5^{3} \times 5^{4} = 5^{3 + 4} = 5^{7}$

So, Tina’s answer is wrong.