A sector of a circle of radius 6cm subtends an angle in of 105 at the centre of the circle. Calculate I)the length of the minor
Ii)Perimeter of the sector
Iii)the area of the sector[take pi =22/7

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?