Simplify. 3(4-2.8)^3 Answer choices A)4.73 B)5.18 C)53.86 D)263.42

Mathematics

2 answers:

Westkost [7]3 years ago

7 0

Answer:

B) 5.18

Step-by-step explanation:

$3(4 - 2.8)^{3} \\ = 3(1.2)^{3} \\ = 3\times 1.728 \\ = 5.184 \\ \approx \: 5.18$

Thus, option B) 5.18 is the correct answer.

devlian [24]3 years ago

6 0

Answer:

I think B

Step-by-step explanation:

the answer I got is 5.184

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Answer:

Step-by-step explanation:

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$\text{The scientific notation:}\\\\a\times10^n\\\\1\leq a$

$a.\\(5\times10^3)\times(3.5\times10^{-1})=(5\times3.5)\times(10^3\times10^{-1})\\\\=15.75\times10^{3+(-1)}=15.75\times10^2=1.575\times10\times10^2\\\\=1.575\times10^{1+2}=\boxed{1.575\times10^3}$

$b.\\(8\times10^2)\div(4\times10^3)=(8\div4)\times(10^2\div10^3)=2\times10^{2-3}\\\\=\boxed{2\times10^{-1}}$

$c.\\(6\times10^{-3})^2=6^2\times(10^{-3})^2=36\times10^{-3\cdot2}=36\times10^{-6}=3.6\times10\times10^{-6}\\\\=3.6\times10^{1+(-6)}=\boxed{3.6\times10^{-5}}$