240.
147.658 to two significant figures is 150.
3.2*1.05=3.36=3.4(sf) With two significant figures
42 has two significant figures.
To find the product of 3.25 g and 4.145 g, you multiply the two values, which equals 13.487125 g. However, the result should be expressed with the correct number of significant figures. Since 3.25 g has three significant figures and 4.145 g has four significant figures, the product should be rounded to three significant figures, resulting in 13.5 g.
687 to two significant figures is 690.
0.081778 to two significant figures is 0.082
147.658 to two significant figures is 150.
Yes, that is correct.
Yes, that is correct.
3.2*1.05=3.36=3.4(sf) With two significant figures
It is: 62 kg
To express 1602 to 2 significant figures, you identify the first two non-zero digits, which are 1 and 6. Rounding the number, it becomes 1600. Thus, 1602 correct to 2 significant figures is 1.6 × 10^3.
The correct answer is 2. The three zeros between the decimal point and the 1 are place holders but they are NOT significant digits. See, for example, the Wikipedia link.
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
78.24 since you had two decimal places in the multiplier you'll have two in the answer.
350, as the 5.128 rounds up
There are two significant figures which are the two 2s.