Answer:
9 inches.
Step-by-step explanation:
The formula for the volume of a rectangular prism is base x height. So if the volume is 378, and the base is 42, you would use the equation 378/42 to find the height. 378/42 is 9. Therefore, the height is 9 inches.
Answer:
36.3 m
Step-by-step explanation:
because a decagon has 10 sides so 363 divided by 10=36.3
2(40)+20 = 100m
40+20= 60m
100x60= 6000m
Answer:
z-score = 1.667
Step-by-step explanation:
The provided information are:
Population mean 
= 50
Population standard deviation 
= 6
Score (X) = 60
The formula to calculate the <em>z</em>-score is:
The z- score can be calculated as:
Hence, the z-score is 1.667.
First, rearrange the quadratic equation:
5x² + 9x - 4 = 0
Now, compare it to the general quadratic equation:
a<span>x² + bx + c = 0
Therefore you get:
a = +5
b = +9
c = -4
And the quadratic formula will be:
x = [-b +/- </span>√(b² - 4ac)] / 2a
= [ -5 +/- √(81 - 4·5·(-4))] / 2·5
= (-5 +/- √161) / 10
