15 POINTS NEED ASAP PLS!!!!

Mathematics

2 answers:

Marina86 [1]3 years ago

8 0

Answer:

Need a pic to answer your question

xz_007 [3.2K]3 years ago

7 0

Answer:
Yes
Step-by-step explanation:
Remember in order for the rates to be proportional it has to have a constant rate of change and it has to go through the origin if graphed
For one this has a constant rate of change which is 3 dollars per 25 messages
Now we just have to find out if it would go through the origin (0,0)
To do so we subtract 3 dollars and then 25 messages
6-3=3
50 - 25 =25
then again 25-25=0
3-3=0
concluding that (0,0) is a solution
Thus meaning that this is a proportional relationship

Hope this helps let me know if you need more help !

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What is the following number in decimal form? 2.93 × 10−7 =

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$a^{-n}=\left(\frac{1}{a}\right)^n\\\\10^{-7}=\left(\dfrac{1}{10}\right)^7=\dfrac{1}{10,000,000}=0.0000001\\\\2.93\times10^{-7}=2.93\times0.0000001=\boxed{0.000000293}$