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unknownyobutt21
06.07.2019 •
Mathematics
Heather has $490 in her savings account. she withdraws $10 per week for gas. enter an equation heather can use to see how many weeks it will take for her to have a balance of $370 the equation - x = can find out how many weeks heather withdraw money from her account
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Ответ:
Ответ:
Let from the height at which ball was thrown = h units
It is given that , ball rebounds the same percentage on each bounce.
Let it rebounds by k % after each bounce.
Height that ball attains after thrown from height h(on 1 st bounce)=![h + \frac{h k}{100}=h \times (1+\frac{k}{100})](/tpl/images/0789/7596/ac1cb.png)
Height that ball attains after thrown from height h (on 2 n d bounce)=![h \times (1+\frac{k}{100})+h \times (1+\frac{k}{100})\times \frac{k}{100}=h \times (1+\frac{k}{100})^2](/tpl/images/0789/7596/be9ba.png)
Similarly, the pattern will form geometric sequence.
S=![h +h \times (1+\frac{k}{100})+h \times (1+\frac{k}{100})^2+h \times (1+\frac{k}{100})^3+.........](/tpl/images/0789/7596/5be6b.png)
So, Common Ratio =![\frac{\text{2nd term}}{\text{1 st term}}=1 +\frac{k}{100}](/tpl/images/0789/7596/bd947.png)
Common Ratio= 1 + the percentage by which ball rebounds after each bounce
the percentage by which ball rebounds after each bounce= negative integer= k is negative integer.