[填空题]
The following table shows the x wv z/p 3r0lz52a5e8ri zym5lm andk w39 9urkcblvuz-nn)p g2 i8-4eqy5k y coordinates of five points that lie on a curve qzb4-g 39 )nnl v-irwc82eyuuk 5k 9kpy=f(x) .
1. Estimate the area under the curve over the interval 1 The equation of the curve was found to be y=-$\frac{1}{10}(4 x+5)(x-8)$ .
it is approximately equal to units$^2$
2. Find the exact value of the area under the curve over the interval 1A=$\frac{a}{b}$;a= ,b= .
3. Find the percentage error between the estimation in part (a) and the exact value in part (b). Provide a reason for the difference.it is approximately equal to %(two decimal places)
