Answer:
Solution given:
<A=49°
<B=90°
angle ECD=?
we have
<A+<B+<C=180°[sum of interior angle of a triangle is 180°
<A+40+90=180°
<A=180°-130°
<A=50°
wehave
<A=<ECD[vertically opposite angle]
:.<u>angle</u><u> </u><u>E</u><u>C</u><u>D</u><u>=</u><u>5</u><u>0</u><u>°</u><u>.</u>
So first you have to find the median, to do this you use the formula (n+1)/2 with n being how many numbers there are.
As there are 4 numbers we can substitute it into the formula to make (4+1)/2 which is 2.5
Then you find the 2nd place and the 3rd place (which are 5 and 8) and find exactly the middle of them which is 6.5 (the median)
To find the lower quartile we take the 2.5 from earlier and divide it by 2 to make 1.25 so we find where that place is in the number. 4 is the first place and then we find what 1/4 is and add that on to make 4.25 which is the lower quartile.
Then you do 2.5+1.25 to find the upper quartile to make 3.75 so we find where that is in the numbers which is in-between 8 and 13 so it will be 8+1.22 to make 9.22
So to find the interquartile range you do the upper quartile takeaway the lower quartile so 9.22-4.25 which is 4.97 and that is the answer
9514 1404 393
Answer:
-19/7
Step-by-step explanation:
If the variation is direct, any multiplier of the m-value will also multiply the f-value.
old value × 1/7 = new value
m: 14 × 1/7 = 2
f: -19 × 1/7 = -19/7
The new value of f is -19/7.
Answer:50,400
Step-by-step explanation:
Answer:
$7.20
Step-by-step explanation:
20% of 36 is 7.2
