Answer:
Height is 21cm
Step-by-step explanation:
Volume of the cylinder = 1029pi
Base area = 7x7xpi = 49pi
Therefor the height = 1029pi/49pi=1029/49 = 21cm
Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.
<h3>What do you mean by standard deviation?</h3>
In statistics, Standard deviation is a measure of the variation of a set of values.
σ = standard deviation of population
N = number of observation of population
X = mean
μ = population mean
WE have been given that SAT scores are normally distributed, with a mean of 500 points and a standard deviation of 100 points.
The solution as follows;
Let be X: scores of SAT
P(X ≥ x) = 0.9
P((X - 500)/100 ≥ (x - 500)/100) = 0.9
P(Z ≥ z) = 0.9
z = 1.28
1.28 = (x - 500)/100
128 + 500 = x
x = 628
Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.
Learn more about standard deviation and variance:
brainly.com/question/11448982
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The blank is -8
Step-by-step explanation:
Let us revise some rules of indices:
∵ 
× 
= 
× 
∵ All bases are equal
∴ Use the first and third rule above to find x
∵ × = 
∴ × = 
⇒ L.H.S
∵ × = 
⇒ R.H.S
Equate L.H.S and R.H.S
∴ =
Equate the indices of the two sides
∴ -3 = 5 + x
- Subtract 5 from both sides
∴ -8 = x
∵ x represents the blank
∴ The blank = -8
The blank is -8
Learn more:
You can learn more about the indices in brainly.com/question/4419221
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Answer:no
Step-by-step explanation:
Answer:
y=2x
Step-by-step explanation:
x=1.5
1.5x2=3
thats it ithink so
×
=