To how many significant figures should each answer be rounded? a) (6.62610^-34 js)(2.997910^8 m/s) / 4.07010^-7 m = 4.880610663391*10^-19 j(unrounded)b) (6.02210^23 atoms/mol)(0.589 g) / 20.18 g/mol = 1.75810^22 atoms (unrounded)

a) after rounding: 4 significant figures.

b) after rounding: 3 significant figures.

Step-by-step explanation:

Significant figures are the number of needed place values for accuracy. The product or quotient of numbers with significant figures must be rounded to the least amount present within the problem.

a) (6.62610^-34 Js)(2.997910^8 m/s) / 4.07010^-7 m = 4.880610663391*10^-19 J

4.880610663391*10^-19  rounds to 4.880 * 10^-19 since the least number of significant digits is 4 within the problem.

b) (6.02210^23 atoms/mol)(0.589 g) / 20.18 g/mol = 1.75810^22 atoms

1.75810^22 rounds to 1.76 *10^22 since the least number of significant digits within the problem is 3.

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right