3. Given \( \frac{8}{30} \) and \( \frac{12}{36} \) What is the HCF of the numbers A) \( \frac{2}{3} \) B) \( \frac{2}{6} \) C) \( \frac{1}{6} \) D) \( \frac{4}{3} \)

\( 2 + ( - \frac { 11 } { 3 } ) ; \quad - \frac { 1 } { 4 } - ( - \frac { 5 } { 6 } ) - 3 \)

What is the least common multiple of 10 and 15 ? A. 5 B. 25 C. 30 D. 60 E. 150

A seamstress is using an old cloth measuring tape marked with units to \( 1 / 8 \) of an inch, but the problem is that the old measuring tape has stretched and always gives a slightly larger measurement. The tape is used to measure the length of a dress pattern and then the same tape is used to measure the width of the same pattern. A length of \( 6 \frac{7}{8} \) inches is measured. a) What can you say about the degree of accuracy of the measurement? b) What can you say about the degree of precision of the measurement?

11. State the temperature shown on the thermometer in the form: measurement \( \pm \) uncertainty 12. The uncertainty for the speedometer of a vehicle is \( 5 \% \) of the speedometer's reading. Calculate the minimum speed a vehicle could be travelling if its speedometer reads 60

Carry out the calculations each person is performing and give the correct uncertainty. a) A truck operator estimates the distance from a land fill site to a job site to be 9.4 km . He adds 0.5 km for travel inside the job site and 0.3 km at the land fill site. What are the combined distances and uncertainties?