Answer:
The product cost in t days if the price is reduced by $3 a day is [tex]\$90-3t[/tex]
The product cost in t days if the price is reduced by 7% a day is [tex]\$ 90-\frac{63}{10} t[/tex]
Step-by-step explanation:
Given
A product costs $90 today.
Step 1 of 2
If price reduced by [tex]\$3[/tex] a day:-
Total reduced price after "t" [tex]=3t[/tex]
Product cost after [tex]t[/tex] days [tex]=\$ 90-3 t[/tex]
Step 2 of 2
If price reduced by [tex]$7\%$[/tex] a day:-
Total reduced price after 't' days
[tex]=\left(\frac{7}{100} \times 90) t \\[/tex]
[tex]=\frac{63}{10} t[/tex]
Product cost after ' [tex]$t$[/tex]' days [tex]$=\$ 90-\frac{63}{10} t$[/tex]
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