Answer:
477.52cm^2
Step-by-step explanation:
Brainliest or I will report you
Answer:
it would be 10
Step-by-step explanation:
Answer:
(simplified form)
Step-by-step explanation:
I is the total length of all the 5 rods.
Each of the 5 parts lengths are
, respectively.
<em>We add all of them and equate it to I:</em>

<em>Simplifying this, we take like terms and add:</em>
<em>
</em>
Answer:
u= 18 square millimeters
Step-by-step explanation:
The surface area formula is A=6a^2
You plug in the given surface area (1944) into A.
Divide both sides of the equation by 6. On the left you will get 324 and on the right you will eliminate 6 and get a^2.
The only way to get rid of an exponent is to square root it, and whatever you do to one side you have to do to the other. The square root of 324 is 18 and that is your answer.
Answer:
Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
Step-by-step explanation:
The formula to use to solve this question is called the Confidence Interval formula.
Confidence interval =
x ± z × ( σ/ (√n) )
Where:
x = the sample mean = 130
z = the z-value for 90% confidence = 1.645
σ = standard deviation = 7
n = sample size = 145
130 ± 1.645 × (7/√145)
130 ± 0.9562687005
130 - 0.9562687005 = 129.0437313
130 + 0.9562687005 = 130.9562687005
Therefore, approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956