10. A sample of metal is heated to 698°C and then allowed to cool. The temperature of the metal over time is given by the formula n= 698– 21 -0.51, where t is the time in seconds after the start of the cooling process, and n is the temperature of the sample in degrees Celsius. After how many seconds will the temperature of the sample be 500°C? a) 16 b) 18 c)20 d) 22 e) 24 f) 26

5. Find the following values of and write all the work not just the answer. a) 14C7 = b) 9P3 = %3D

6. The height h, in feet, of a model rocket t seconds after launch is given by h = 256t-16r². As the rocket descends, it deploys a recovery parachute when it reaches 200 ft above the ground. At what time does the parachute deploy?

If the temperature of the metal surface is {6} K, then calculate its value in Fahrenheit O a. -448.600 O b. 258.556 O c. 470.200 O d. -287.444