Answer:
0.0406, 0.8284,0.7887
Step-by-step explanation:
Given that Mattel Corporation produces a remote-controlled car that requires three AA batteries
X is N(34, 5.5)
Hence sample size of 25 would follow a t distribution with df = 24
This is because sample size <30
t distribution with df 24 would be bell shaped symmetrical about the mean and unimodal.
Std error of sample mean = std dev /sqrt n=
Prob (X>36) = 
i.e nearly 4.1% of the sample would have a mean useful life of more than 36 hours
X>33.5 implies 
=0.82837
=0.8284 proportion will have a mean useful life greater than 33.5 hours
Proportion between 33.5 and 36 hours
= 
Answer:
(9, 6)
Step-by-step explanation:
the given points are
(3, 2)
(6, 4)
so, can you see, how the sequence continues ?
I see immediately that for every 3 additional units of x we add 2 units of y.
so, yes, the next point in the sequence is
(6 + 3, 4 + 2) = (9, 6).
so, this point (or ordered pair) follows the same ratio or proportional relationship between x and y as the points already in the graph.
in other words, they are on the same line following the same slope ("y coordinate change / x coordinate change" when going from one point on the line to another).
Answer:
0.54kilometres
Step-by-step explanation:
a)actual distance =2.7*20000
=54000cm
=0.54kilometres
The two numbers are 6 and 10
<em><u>Solution:</u></em>
Let "x" be the smaller number
Let "y" be the larger number
Given that difference between two numbers is 4
larger number - smaller number = 4
y - x = 4 ----- eqn 1
Also given that three times the smaller number is equal to two times the larger less two
three times smaller number = 2 times larger number less two
3x = 2y - 2 ---- eqn 2
From eqn 1,
y = 4 + x --- eqn 3
Substitute eqn 3 in eqn 2
3x = 2(4 + x) - 2
3x = 8 + 2x - 2
x = 6
From eqn 3,
y = 4 + 6 = 10
Thus the two numbers are 6 and 10
