Answer:
Step-by-step explanation:
Answer:
2.015 ⋅ 10^-6
Step-by-step explanation:
They're thinking about either 63 or -63.
Answer:
7^(1-3+1) = 7^-3
Step-by-step explanation:
Here is the rule you should know: when multiplying powers of the same base you add the exponents ans when dividing powers of the same base you subtract the exponents.
Also, if there is no number at the exponent, it is 1.
