2a certain radioactive element decays exponentially at a rate of 1% a year. initially the mass
of the radioactive element is 50 grams. which is the best approximation of the mass of the
element after 10 years?
a
5 grams
b
c
45.2 grams
50.5 grams
d
500 grams

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

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.