The answer is 5.5
The standard deviation (sd or σ) of the sample mean difference is:
sd = √(sd₁²/n₁ + sd₂²/n₂)
For the population A:
sd₁ = 17.6
n₁ = 25
For the population B:
sd₂ = 21.2
n₂ = 30
Hence:
sd = √(sd₁²/n₁ + sd₂²/n₂)
= √(17.6²/20 + 21.2²/30)
= √(309.76/20 + 449.44/30)
= √(15.49 + 14.98)
= √(30.47)
= 5.5
Answer:
Step-by-step explanation:
X + X + 96 = 180 {SUM OF ANGLES OF TRIANGLE}
2X + 96 = 180
2X = 180 -96
2X =84
X = 84/2
X = 42
If Ava waters her lemon tree 12 times, then she has used 10.667 gallons of water.
<u>Solution:</u>
Given that , Ava uses 
gallons of water every time she waters her lemon tree.
If she waters her lemon tree 12 times, we have to find how much water will she use
Total water used = water used for 1 time 
number of time water used for plants
Here water used for one time = 
Number of time watered = 12
Hence, Ava used 10.667 gallons of water.
Answer:
sure
Step-by-step explanation:
