Estimate . then find the difference 4.23-2.51
2 answers:
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<span>x = b - cd
</span>
Subtract b on both sides
x - b = -cd
Divide both sides by -d
c =
</span>
Subtract b on both sides
x - b = -cd
Divide both sides by -d
c =
Answer:
Depth of Martens aquarium water = 14 cm.
Step-by-step explanation:
Given:
An aquarium,which is a right rectangular prism.
Length of the aquarium, = 18.5 cm
Width of the aquarium, = 15 cm
Volume of the aquarium, = 3885 cm cubes
We have to find the depth of the aquarium.
Let the depth be cm.
Note:
Volume of the rectangular prism,V=lbh.
⇒ =
⇒
⇒ Plugging the values.
⇒
⇒ cm
So,
The depth of the aquarium water is 14 cm.
Answer:
Step-by-step explanation:
Given that confidence level is 95% and sample mean is within 10 minutes of the population mean. i.e. margin of error = 10
Std deviation of population= 211 minutes
Margin of error = Z critical * std error
Std error = sigma/sq rt n =
Hence we have
\frac{211}{\sqrt{n} }
The minimum sample size is 1710
a) There may not be 1,809 computer users to survey