1) How many SD's?

a) 5.7 = 2 SD
b) 235.12 = 5 SD
c) 8.07 = 3 SD
d) 0.0032 = 2 SD
e) 0.0150 = 3 SD
f) 1.39x10^5 = 3 SD
g) 15.200 = 5SD
h) 1070 = 3 SD

2) Calculations - Please check the SDs
a) 15.3 + 25.03
= 40.33
= 40.3

b) 1200 + 63
= 1263
= 1300

c) 4.78 - 1.2
= 3.58
= 3.6

d) 243.1 + 15.2 + 3.75
= 262.05
= 262.1

e) 0.00170 + 0.02561
= 0.02731
= 0.0273

f) 4.0 - 3.99
= 0.01....

g) 2.7x82.7
= 223.29
= 220

h) 1074x3.21
= 3447.54
= 345

i) 0.022 x 9.7
= 0.2134
= 0.21

j) 0.0220 x 9.70
= 0.2134
= 0.213

k) 23.5/2.0
= 11.75
= 10

l) 0.1735/23
= 0.00754
= 0.0075

m) 18.2 x 27.9 x 1.3
= 660.114
= 660

n) 6.7x2.73/14.74
= 1.240
= 1.24

3) What units would result?
a) cm/s x s
= cm

b) m^2/s
=

c) m/s^2 x s
= m/s

d) m/s / s
=

e)g/cm^3
=

f) kg/m^2 / m
=

2 e,f n are wrong

3. the answers shown are correct, but several are blank.

The reason (e) is incorrect is that, even though 0.00170 has three sig. digits, this is an addition problem, so only five places to the right of the decimal are required to match the significance of the 0.02561

no because i would not quit

1) To determine the number of standard deviations (SDs) for each value, we can use the formula:

SD = (Value - Mean) / Standard Deviation

a) For 5.7:
SD = (5.7 - Mean) / Standard Deviation

To get the number of SDs, we would need to know the Mean and Standard Deviation.

Similarly, for the other values (b to h), we would need the Mean and Standard Deviation to calculate the number of SDs.

2) To check the SDs for the given calculations, we would need the Mean and Standard Deviation for each set of values. Without these values, it is not possible to accurately determine the SDs.

a) 15.3 + 25.03 = 40.33

b) 1200 + 63 = 1263

c) 4.78 - 1.2 = 3.58

d) 243.1 + 15.2 + 3.75 = 262.05

e) 0.00170 + 0.02561 = 0.02731

f) 4.0 - 3.99 = 0.01

g) 2.7 x 82.7 = 223.29

h) 1074 x 3.21 = 3447.54

i) 0.022 x 9.7 = 0.2134

j) 0.0220 x 9.70 = 0.213

k) 23.5 / 2.0 = 11.75

l) 0.1735 / 23 = 0.00754

m) 18.2 x 27.9 x 1.3 = 660.114

n) 6.7 x 2.73 / 14.74 = 1.240

3) To determine the units for the given expressions:

a) cm/s x s = cm

b) m^2/s = m^2/s (no change)

c) m/s^2 x s = m (the "s" cancels out)

d) m/s / s = m/s^2 (division by "s" is equivalent to multiplying by its reciprocal, so "s" cancels out)

e) g/cm^3 = g/cm^3 (no change)

f) kg/m^2 / m = kg/m^3 (division by "m" is equivalent to multiplying by its reciprocal, so "m" cancels out)