This may help you
You need to calculate the z-scores for (3.0 - 1.7) years and (3.0 + 1.7) years.
Then you use a standard normal distribution table to calculate the required probability.
The formula for finding the z-score is
<span>z=<span><span>X−μ</span>σ</span></span>
Answer:
It is an imaginary number.
Step-by-step explanation:
In this example, the real number is -2 is being multiplied by the imaginary unit, i, which i can be also expressed as (√-1).
Answer:
Divide the volume by the length of the prism to get the area of the face:
468/13 = 36 square yards.
The area of the face ( triangle) is 1/2 x base x height
Replace with what you have:
36 = 1/2 x 9 x g
Multiply both sides by 2 to remove the 1/2:
72 = 9 x g
Divide both sides by 9 to find g:
g = 72 /9
g = 8 yards.
9514 1404 393
Answer:
Step-by-step explanation:
The sum of complementary angles is 90°.
∠ABD +∠BDC = 90°
(y -30)° +(2y)° = 90°
3y = 120 . . . . . . . . . . . . divide by °, add 30
y = 40 . . . . . . . . . . . divide by 3
∠ABD = (40 -30)° = 10°
∠BDC = 2(40)° = 80°