The formula is <span>base × height / 2
So 8.7 x 15.6=135.72 / 2= 67.86
</span>
Answer:41 m
Step-by-step explanation:
Lets use the Pythagoras thermos to solve
40^2+9^2=c^2
1600+81=c^2
1681=c^2
41=c
The value of the hypotenuse is 41
I see you already attempted this question and got it right, Good job!
Total $19.75
Adding 5%
Taking away 20%
1). $19.75 x 0.20(20%) = 3.95
3.95 + 19.75 = 23.7
2). $19.75 x 0.05(5%) = 0.9875
0.9875 + 23.7 = 24.6875
= 24.6875
Answer:
I got you, give me a few minutes
1st one: 6x+12+6y
2nd one: -12a-20b
4th one: 2x times 18
Step-by-step explanation:
Standard deviation= σ= 0.1
Confidence interval= 95%= 0.95
Significance level=α= 1-0.95= 0.05
α/2 = 0.025
At α/2 z( α/2 ) =1.960 [from statistic table]
Now,
the sample size at error of 0.02 is
0.02=z( α/2 )σ/√n
0.02=(1.960)*(0.1)/√n
5/49 = 1/√n
√n=49/5
n=96.04
n should be 96 or greater