Answer:
2/3
Step-by-step explanation:
Class 2 scored better on average
<h3>How to determine which class scored better on average?</h3>
The averages and the standard deviations are given as:
Class 1
Mean score = 7.8
Standard deviation = 1
Class 2
Mean score = 8.1
Standard deviation = 0.2
As a general rule, the smaller the standard deviation; the better the average
Class 2 has a smaller deviation
Hence, class 2 scored better on average
Read more about standard deviation at:
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Answer:
15 ft
Step-by-step explanation:
Hi, the illustration for the problem is a right triangle with:
hypotenuse (C)= the length of the ladder = L
horizontal side(A) = distance from bottom of the ladder to the building = L - 6
vertical side(B) = distance from the top of the ladder to the bottom of the building = L - 3
So, we can use Pythagoras formula:
A2 +B2= C2
(L – 6 )² + (L-3)² = L²
L²-12L+36+L²-6L+9 =L²
L2 -18L+45 =0
APPLYING QUADRATIC FORMULA WE OBTAIN:
L =15 OR L=3
If L=3
Vertical side = L-3 = 0 (Length can´t be 0)
So L=15
(0,0)
(1,8)
(2,16)
branliest please do i can get to the next level thank u
RS; RP; RQ; QP
Using RQ^2 = (RS)(RP) <--- That's the length of a secant and chord
to find RQ (You already know the length of RS and RP, because they are labelled, so the only other value that can be found is RQ)
QP (This is the only value that hasn't been found)
(14)(14+12) = RQ^2 -->
14(26) = RQ^2 -->
2sqrt(7*13) = RQ
QP = sqrt(26^2 - 364) = sqrt(676-364) = 2sqrt(78)