Answer:
a
Step-by-step explanation:
|x| means absolute value.
17-8=9. the absolute value of 9 is 9. (thats why all the negative answers are wrong)
Answer:
8.4 (rounded to 1 dp)
Step-by-step explanation:
1) Identify the number of angles and sides given if you cannot use Pythagoras or SohCahToa.
2) You have 2 angles and 1 side, so you know you must use sine rule: <em>a </em>over sinA =<em> b </em>over sinB
<em>a</em> = side length, sin(A) = angle opposite side
<em>b</em> = side length, sin(B) = angle opposite side
3) This means:
13/sin(90) = x/sin(40)
4) rearrange for x:
x = 13/sin(90) * sin(40)
= 8.356...
5) Round to however many sig figs/dps they're asking for
Example: 1 dp
AB = 8.4
3 sig figs
AB = 8.36
Equation: 330-.255(5)=X. Multiply: .255(5)=1.275, 330-1.275=X. Subtract: 330-1.275=328.725 or 328.73 :)
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The correct answer: 7.428 inches
Explanation:
Given the equation is D(r) = 0.145r^2
Where D is the depth and r is the radius
Putting D = 8 inches in the equation
8 = 55.2
r^2= 8/ 0.145
r^2 = 55.2
R^2= 7.428 inches
The radius of depth is 7.428 inche
Hope this help you : )
