$0.\underbrace{00028}_{\rightarrow5places}=28\times10^{-5}\\\\0.00028:(7\times10^{-4})=\dfrac{28\times10^{-5}}{7\times10^{-4}}=\dfrac{28}{7}\times\dfrac{10^{-5}}{10^{-4}}\\\\=4\times10^{-5-(-4)}=4\times10^{-5+4}=\huge\boxed{4\times10^{-1}}\leftarrow\boxed{b.}\\\\used\ \dfrac{a^n}{a^m}=a^{n-m}$

6 0

3 years ago

Sequence 1,2,3,6,18,108 multiply the previous 2 terms to get the next term

Semenov [28]

1,2,3,6,18,108,1944,209952,

5 0

3 years ago

I dont understand help me please

ira [324]

The answers are A and F.
You can tell by looking at the slopes and seeing that they've been flipped and one is positive while the other is negative.

4 0

3 years ago