michael started a savings account with $300. after 4 weeks, he had $350, and after 9 weeks, he had $400. what us the rate of change of money in his savings account per week?

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3

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.

the answer is: -22 also a

hope i

-lavira: )