Answer:
A) t = (f -v)/a
Step-by-step explanation:
Undo the operations done to t, in reverse order. Here, t is multiplied by "a" then the product is added to v.
To solve for t, first you undo the addition of v by subtracting v from both sides of the equation.
f = v + at
f - v = at . . . . . subtract v
Then you undo the multiplication by "a" by dividing both sides of the equation by "a":
(f - v)/a = t . . . . . . sort of matches choice A
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Please note that the parentheses are required. f -v/a is something quite different. If this is typeset, the fraction bar does the grouping. If it is written in plain text, parentheses are required for grouping.
![t=\dfrac{f-v}{a}](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7Bf-v%7D%7Ba%7D)
Answer:
C
Step-by-step explanation:
The amount of sides on the shape are increasing, like 4, 5, 6, so the best answer should be 7 sides for the next shape, however there is no shape that is 7, so C which has 8 sides is the next best answer.
Given:
standard deviation = 4.3%
sample size = 15
mean = 26.4%
error = σ/√n
error = 4.3% / √15
error = 4.3% / 3.873
error = 0.0111
0.0111 x 100% = 1.11%