I need some help with 7. We have to work backwards

Mathematics

2 answers:

cupoosta [38]3 years ago

5 0

1 month: $3. Second: 3+3(2)=9. Third: 9+6(2)=21. Fourth: 21+12(2)=65. Fifth: 65+24(2)=113. In 5 months he would have saved $113 since he only needs $90 the answer is 5 :)

Stella [2.4K]3 years ago

3 0

Answer:

Maybe next time zoom out, so I can see the pic?

Step-by-step explanation:

Thank you!!!!

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Answer:

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Step-by-step explanation:

a.The standard score,z, is esentially x reduced by process mean then divided my process standard deviation.

$\mu=10,\sigma=0.15\\Therefore:-\\z=\frac{x-\mu}{\sigma}=\frac{9.85-10}{0.15}\approx-1.0\\z=\frac{x-\mu}{\sigma}=\frac{10.15-10}{0.15}\approx+1.0\\P(x10.15)=P(Z+1.0)\\=2P(Z$