The tyres of moving car doesn’t normally give a black mark on the road. However if a car suddenly applies the break and moves forward a short distance, it leaves a black mark’.

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)

When using the scientist method, which step comes last?

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point