Question

@DanJS

Answer 1

i know the min is 68 and the max is 95

Answer 2

@DanJS

Answer 3

hmm, i have to remember what this means..

Answer 4

i c now

Answer 5

you have to do one for each interval...
x=1 to 3, 3 to 4...., all of em, and add them up

Answer 6

if I divide your interval, namely [1,10] in ten equal length sub intervals, then applying the rectangle method I find:

Answer 7

\[\int\limits_{1}^{10}f(x) dx=\frac{ 10 }{ 10 }(f(1)+f((3)+f(4)+f(6)+f(7)+f(9)+f(10))=76\]

Answer 8

thanks!!

Answer 9

ok

\[\Delta x = \frac{ b-a }{ n } = \frac{ 10 - 1 }{ 6 } = \frac{ 3 }{ 2 }\]
\[\int\limits_{a}^{b}f(x)dx \approx \frac{ \Delta x }{ 2 }[f(1) + 2*f(3) + 2*f(4) + 2*f(6) + 2*f(7) +2*f(9) + f(10)]\]

Answer 10

\[\frac{ 3 }{ 4 }[4 + 2*8 + 2*6 + 2*10 + 2*10 + 2*12 + 16] \]

Answer 11

I got 84

Answer 12

@mondona

Answer 13

got it!

Answer 14

@DanJS your answer was right! 84 thanks!