Two Petri dishes were on the desktop in Dr. McFarlan's lab.

Dish A had cells with a radius of 3.4 × 10^-13 cm. Dish B had cells that had a radius of 4.6 × 10^-11 cm. What is the sum of the radii of the two types of cells, using scientific notation?
A.
4.634 × 10^-15 cm
B.
46.34 × 10^-14 cm
C.
463.4 × 10^-13 cm
D.
4.634 × 10^-11 cm

clock

step-by-step explanation:

me! what did you put for this question?

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.