Because ABCD is a rhombus, ΔABC ~ ΔADC.
The length of AC = 4 (the base of ΔABC.
The height of ΔABC = 7 - 1 = 6
The area of ΔABC is
(1/2)*4*6 = 12
Therefore the area of ABCD = 2*12 = 24
Answer: 24
Answer:
There is enough evidence to reject the manufacturer’s claim and the standardized test statistic z is -3.43
Step-by-step explanation:
A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135°F.
So, Null hypothesis:
Alternate hypothesis :
To test this claim, you randomly select a sample of 32 systems and find the mean activation temperature to be 133°F.
x=133
n = 32
Population Standard deviation =
Formula :

z=-3.43
Refer the z table for p value
p value = 0.0003

p value < α
So, we failed to accept null hypothesis
Hence there is enough evidence to reject the manufacturer’s claim and the standardized test statistic z is -3.43
If you divide 783 by 18 you'll get 43.5
Hope this helped! (:
5.34+6.89= 12 That is what I got
Answer:
16
Step-by-step explanation:
(1) Get the mean: (2 + 13 + 4 + 10 + 6) / 5 = 7
(2) Variance Formula: Σ(x-mean)^2)/N
-> <u>(2-7)^2 + (13-7)^2 + (4-7)^2 + (10-7) ^2 + (6-7)^2</u>
5
= 16