Use your calculator to find the log of the following numbers.(a) 10−9(b) 1 × 10−11(c) 7.4 × 103(d) 105(e) 1

A group of students took turns using a laboratory balanceto weigh the water contained in a beaker. The results theyreported were 111.42 g, 111.67 g, 111.21 g, 135.64 g,111.02 g, 111.29 g, and 111.42 g.(a) Should any of the data be excluded before the average     is calculated?(b) From the remaining measurements, calculate the average value of the         mass of the water in the beaker.(c) Calculate the standard deviation s and, from it, the     95% confidence limit.

An individual weighs 81.4 kg and is 1.78 m tall. (a) What is the person's equivalent measurement in pounds? (b) What is the person's equivalent measurement in feet?

Perform the following calculations and report each answer with the correct number of significant figures. (a) 635 ✕ 335 (b) (5.23 ✕ 102) ✕ (6.8 ✕ 103) (c) 27.2/13.383 (d) 8179 ✕ 0.000051 (e) 14.23 + 27360 + 84.5721 (f) 47.2 + 0.291