The human retina contains cells called rods and cones that absorb light and change it
to electric signals sent to the brain. There
are approximately 120,000,000 rods and
6,000,000 cones in a retina. How is the
number of rods in a human retina written
using scientific notation?

H) 1.2 x 10^8

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

1.2 x 10^8

e) none of the above because the measure of angle cba is 101°

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13