The average velocity of a car is determined by computing v = dit, where t is the time to travel distance d. The distance is known to be exactly d = 50 ft. The time + is measured with a stopwatch. Accounting for measurement uncertainty, the time is 1.2 ‡ 0.1 s at 95% probability. What is the uncertainty in vat 95% probability? (a) 6.94 ft/s (b) 3.21 ft/s (C) 3.79 ft/s (d) 3.50 ft/a (e) 7.00 (f) none of the above

Use the table of values you made in part 4 of the example to find the limiting value of the average rate of change in velocity.

Read the setting of the metric vernier micrometer scale graduated in Figure 41-1 in 0.001m

Find each percentage. Round the answers to 2 decimal places when necessary. a. 15%of60 b. 3% of 42.3 c. 72.8% of 120 d. 0.7% of 812 e. 42.6% of 53.76 f. 130%of212 g. 1212 of32 h. 14 of 627.3

Can balloons hold more air or more water before bursting? A student purchased a large bag of 12-inch balloons. He randomly selected 10 balloons from the bag and then randomly assigned half of them to be filled with air until bursting and the other half to be filled with water until bursting. He used devices to measure the amount of air and water was dispensed until the balloons burst. Here are the data

The value of (8.1)/ .

Suppose that a customer is purchasing a car. He conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. He conducts this experiment 15 times on each car and records the number of miles driven. Median for Car 2 M = 250 mi / 10 gal (Type an integer or decimal rounded to one decimal place as needed.) Full data setO Range for Car 1 R=O mi / 10 gal (Type an integer or decimal rounded to one decimal place as needed.) Car 1 245 242 215 244 220 265 291 160 284 251 169 319 257 306 267 Range for Car 2 R=O mi / 10 gal (Type an integer or decimal rounded to one decimal place as needed.) Car 2 230 206 214 236 242 256 245 255 241 264 276 252 250 251 257

G iven: mean =85 s=12 n =3500 Find std. score z for x=80

Using the data attached, compute the following  1.  x-bar=2. Sx=3. n=