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True [87]
2 years ago
11

Help plz..And No links!! I repeat No links!!

Mathematics
2 answers:
earnstyle [38]2 years ago
4 0

Answer:

Step-by-step explanation:

36/16=90/r(since they are similar use this ratio)

do cross multiplication

16*90=36*r

1440=36r

1440/36=r

40=r

ELEN [110]2 years ago
4 0

Answer:

\frac{36}{16}  =  \frac{90}{x}  \\ x = 40 \: mm

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\bf f(x)=0.35x^2-2.1x+15.8\qquad 
\begin{cases}
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the minimum or lowest point for a quadratic opening upwards is, well, the vertex point :),   the "x" value is the year, the "y" or f(x) value is the population, we're asked for the year, or the x-coordinate of the vertex

well   \bf \begin{array}{llll}
f(x)=&0.35x^2&-2.1x&+15.8\\
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\end{array}
\\\\

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\left(\boxed{-\cfrac{{{ b}}}{2{{ a}}}}\quad ,\quad  {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)
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