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3 years ago

PLEASE HELP WITH BOTH OF THESE ASAP!

Mathematics

2 answers:

natima [27]3 years ago

8 0

Answer:

can you zoom in on the screen please

Step-by-step explanation:

300

Murljashka [212]3 years ago

7 0

Answer:

Hello,

Step-by-step explanation:

$\overline{x}=3262\\\sigma=1100\\\\P(x\geq 1000)=P(x\leq 3262+(3262-1000))=P(x\leq 5524)\\\\z=\dfrac{x-\overline{x}}{\sigma} =\dfrac{5524-3262}{1100} =2.05\overline{63}\\\\\\P(z\leq 2.05)=0.9789\\\\P(z\leq 2.06)=0.9803\\\\\\\boxed{0.9789\leq P\leq 0.9803}\\\\\\$

$P(x\leq 4000)=P(z\leq \dfrac{4000-3262}{1100} )=P(z\leq 0.67\overline{09})\\\\P(z\leq 0.67)=0.7486\\P(z\leq 0.68)=0.7517\\\\0.7486\leq P\leq 0.7517\\$

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3 years ago

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Hi there!

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3 years ago

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