3 years ago

Evaluate the expression 5 x (8+6-2)

Mathematics

2 answers:

Rom4ik [11]3 years ago

7 0

Answer: 60

Step-by-step explanation:

vaieri [72.5K]3 years ago

6 0

Answer:

The answer is 60

Step-by-step explanation:

You guys can trust me i did it on khan academy today!!

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A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic ca

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Step-by-step explanation:

Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.

But there is no information regarding the population proportion is mentioned.

Formula to find the samples size , if the prior estimate to the population proportion is unknown :

$n=0.25(\dfrac{z*}{E})^2$

, where E = Margin of error.

z* = Two -tailed critical z-value

We know that critical value for 99% confidence interval = $z*=2.576$ [By z-table]

Margin of error = 0.05

Then, the minimum sample size would become :

$n=0.25(\dfrac{2.576}{0.05})^2$

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3 years ago

Write 0.00000000000801 in scientific notation.

Nana76 [90]

$801 \times {10}^{ - 14} = 8.01 \times {10}^{ - 12}$

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Step-by-step explanation:

Espero que te ajude de mucho

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