Answer:
7.2 × 10 ^-5
Step-by-step explanation:
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7.2 × 10 with an exponent of -5
the answer is 7.2×10 with an exponent of -5
namely, what is 1/2 of 3/4, well, is just their product.
Answer: C. 2
Sorry I don´t know the answer but I tried
7:15=(7*3):(15*3)=21:45
7:15=(7*9):(15*9)=63:135
21:45 and 63:135