Answer:
The Communicative Property
Step-by-step explanation:
The <em>communicative property </em>of multiplication allow us to change the numbers' orders in a equation and still get the same product.
I hope this helps.
13. 3 because 4*3= 12. 12-2=10.
From the diagram we have
Base =
Height =
Area = Base × Height
126 =
⇒ Expand the double bracket
126 =
⇒ Subtract 126 both sides
0 =
⇒ Factorise the quadratic expression
0 =
⇒ Equating each factor to zero
We need the positive value of
so we use
Height = 5+1 = 6
Base = 4(5)+1 = 21
Answer:
c. [70.30, 74.70]
Step-by-step explanation:
Confidence interval is a range of values in which there is a specified probability that the value of a parameter lies within that range.
The confidence interval of a statistical data can be written as.
x+/-zr/√n .......1
Given;
Mean gain x = 72.5 cm
Standard deviation r = 4.5 cm
Number of samples n = 16
Confidence interval = 95%
z (at 95% confidence) = 1.96 (from the table)
Substituting the values we have into equation 1;
72.5 +/- 1.96×4.5/√16
72.5 +/- 2.20 cm
[70.30, 74.70]
Therefore, the 95% confidence interval is
[70.30, 74.70] cm
Answer: oops sorry
Step-by-step explanation:
