Answer:
Step-by-step explanation:
Find the volume first.
V= l * w * h
l = 2 cm
w = 3 cm
h = 1 cm
V = 2 * 3 * 1 = 6 cm^3
Density = mass / volume
Density = 420 grams / 6 cm^3
Density = 70 grams / cc^3
Kind of large. Check your givens.
Answer: 3
Step-by-step explanation:
Given : Standard deviation : 
Margin of error : 
Significance level : 
By using the standard normal table of z ,
Critical value : 
The formula we use to find the minimum sample size required :-

i.e. 
Hence, the number of lights should we select if we wish to estimate μ to within 5 seats and be 95 percent confident =3
Answer:
y=1/2x+6
Step-by-step explanation:
First convert everything into inches.
1 foot = 12 in
5 feet = 5*12 = 60 in
12 feet = 12*12 = 144 in
Now add them together
60 + 9 + 144 + 3 = 216 in
or
18 feet
Hope this helps :)
2x + 12 = 18
18 - 12 = 6
2x = 6
x = 3