Let $\mathcal{r}$ be the circle centered at $(0,0)$ with radius $10. $ the lines $x = 6$ and $y = 5$ divide $\mathcal{r}$ into four regions $\mathcal{r}_1$, $\mathcal{r}_2$, $\mathcal{r}_3$, and $\mathcal{r}_4$. Let $[\mathcal{r}_i]$ denote the area of region $\mathcal{r}_i$. If \[[\mathcal{r}_1] > [\mathcal{r}_2] > [\mathcal{r}_3] > [\mathcal{r}_4],\]then find $[\mathcal{r}_1] - [\mathcal{r}_2] - [\mathcal{r}_3] + [\mathcal{r}_4]$.

Which of these is not a function of shock absorbers?

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

The and the gall bladder work together to produce, store, and use bile to digest a) liver; fats b) stomach; fats c) appendix; food. d) pancreas; sugars