In the first figure we have an angle that subtends a diameter. Those are always right angles, so
Answer: x=90 degrees
In the second figure we have to notice that the measure of arcs and central angles are interchangeable -- the measure of an arc is its central angle.
The units are implicitly degrees; the 10 should say 10°
These are supplementary angles so they add to 180°
3x + (7x + 10) = 180
10x = 170
x = 17
Answer: x=17
17° would be more accurate but the units are a bit ambiguous here so I'll leave it.
Answer:
12×5 is 60÷2 is 30
Step-by-step explanation:
the area is 30m square
12/2 = 6 per hour
6/2 = 3 in 30 minutes.
6+3 = 9
6= 1 hour
3 = 30 minutes.
ADD 1 HOUR + 30 MINUTES = 1 HOUR AND 30 MINUTES.
1 HOUR AND 30 MINUTES IS EQUAL TO 90 MINUTES.
HOPE THIS HELPED☺☺
Given that the mean is $9.5 and the standard deviation is $1.30, the standard error will be given by:
σ/√n
where
σ-standard deviation
n=sample size
thus, we shal have:
1.30/√20
=0.2906
Next we find the margin error
0.2906*2=0.581
thus the confidence interval will be:
(9.5+0.581, 9.5-0.581)
=(10.081,8.919)
