What is the value of x?

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Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Is the power produced directly proportional to the wind speed, give reasons for your answer?