A sidewalk is to be constructed around a swimming pool that measures (10.0 0.1) m by (17.0 0.1) m. If the sidewalk is to measure (1.00 0.01) m wide by (9.0 0.1) cm thick, what volume of concrete is needed and what is the approximate uncertainty of this volume?

If the DNA strand in a molecule could be stretched out, it would have a length on the order of 2.0 m. What would this be in feet and inches?

State how many significant figures are proper in the results of the following calculations: (a) (106.7)(98.2)/(46.210)(1.01) (b) (18.7)2 (c) (1.601019)(3712)

Consider the equation 4000/400=10.0 . Assuming the number of significant figures in the answer is correct, what can you say about the number of significant figures In 4000 and 400?

(I) How many significant figures do each of the following numbers have: (a) 214, (b) 81.60, (c) 7.03, (d) 0.03, (e) 0.0086, ( f) 3236, and (g) 8700 ?

Estimate how many days it would take to walk around the Earth, assuming 12 h walking per day at 4km/h.

A thunderstorm drops half an inch 1∙0.01 m2 of rain on Washington, DC, which covers an area of about 70 squaremiles 1∙108m22. Estimate the number of raindrops that fell during the storm.

A marathon runner averages 9.4 mi/h. How long does it take them to run a 26.00-mi marathon in hours? Hint The time it takes to complete the marathon is h. Enter an integer or decimal number, with exactly 2 significant figures [more...]

(I) Write the following numbers in powers of 10 notation:(a) 1.156, (b) 21.8, (c) 0.0068, (d) 328.65, (e) 0.219, and (f )444.