3 years ago

Can someone help me pleaseee...

Mathematics

1 answer:

grandymaker [24]3 years ago

3 0

Answer:

what you need help with?

Step-by-step explanation:

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In monitoring lead in the air after the explosion at the battery factory, it is found that the amounts of lead over a 7 day peri

Andrew [12]

Answer:

$MOE=\pm \ 1.41$

Step-by-step explanation:

-Given that $\sigma=1.91, n=7$

-We determine the z-value corresponding to the 95% confidence level:

$z_{\alpha/2}=z_{0.025}=1.96$

-The margin of error is the degree of error from the real value and is calculated as follows:

$MOE=\pm z_{\alpha/2} (\frac{\sigma}{\sqrt{n}})\\\\=\pm z_{0.025}\times\frac{\sigma}{\sqrt{n}}\\\\=\pm 1.96\times \frac{1.91}{\sqrt{7}}\\\\=\pm 1.41$

Hence, the margin of error is $\pm 1.41$

7 0

3 years ago

Let |a| = 12 at an angle of 25° and |b| = 7 at an angle of 105°. What is the magnitude of a + b? Round to the nearest decimal.

FromTheMoon [43]

Answer:

It is 15.4 on edge. C

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Help A S A P IM STUCK

Gala2k [10]

Answer:

this is the unit area of: 24

Step-by-step explanation: hope this helps

4 0

2 years ago

What is -18+6+3r+13r=

kvasek [131]

If this is just an expression, then all you have to do is combine like terms, or groups of numbers and variables that have the same variable.

When simplified, you get the equation

-12+ 16r or

-18+6+3r+13r=16r-12

7 0

3 years ago

Help plz do those blank ones plz it would mean alot of help

Korvikt [17]

The second in the top row is this:
42.4-1.5(TIMES)3.1
42.4-46.5
-4.1

6 0

3 years ago

Can someone help me pleaseee...​

Can someone help me pleaseee...